chore: Lock the versions of GitHub Actions used in workflows to SHA hashes, other security improvements

.github/dependabot.yml

@@ -5,3 +5,5 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+    cooldown:
+      default-days: 7

.github/workflows/deploy_docs.yml

@@ -12,9 +12,11 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
         with:
           ruby-version: ruby
           bundler-cache: true
@@ -27,7 +29,7 @@ jobs:
       - name: Configure CNAME
         run: echo "ruby-jwt.org" > ./doc/CNAME
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v4
+        uses: peaceiris/actions-gh-pages@84c30a85c19949d7eee79c4ff27748b70285e453 # v4.1.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./doc

.github/workflows/push_gem.yml

@@ -3,6 +3,7 @@
   push:
     tags:
       - v*
+
 name: Push Gem
 jobs:
   push:
@@ -11,20 +12,22 @@ jobs:
       contents: write
       id-token: write
     steps:
-      - uses: rubygems/configure-rubygems-credentials@main
+      - uses: rubygems/configure-rubygems-credentials@762a4b77c3300434bb57c7ce80b20e36231927aa # v2.0.0
         with:
           role-to-assume: ${{ secrets.RUBYGEMS_PUSH_ROLE }}
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
       - name: Set remote URL
         run: |
           # Attribute commits to the last committer on HEAD
           git config --global user.email "$(git log -1 --pretty=format:'%ae')"
           git config --global user.name "$(git log -1 --pretty=format:'%an')"
           git remote set-url origin "https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY"
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
         with:
-          bundler-cache: true
+          bundler-cache: false
           ruby-version: ruby
       - name: Release
         run: bundle exec rake release

.github/workflows/test.yml

@@ -1,6 +1,7 @@
 ---
 permissions: read-all
 name: test
+
 on:
   push:
     branches:
@@ -10,15 +11,18 @@ on:
       - "*"
   schedule:
     - cron: "0 0 * * 5"
+
 jobs:
   rubocop:
     name: RuboCop
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
         with:
           ruby-version: ruby
           bundler-cache: true
@@ -62,10 +66,12 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
@@ -77,7 +83,7 @@ jobs:
         run: echo "SANITIZED_GEMFILE=${{ matrix.gemfile }}" | tr '/' '-' >> $GITHUB_ENV
 
       - name: Upload test coverage folder for later reporting
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: coverage-${{ matrix.os }}-${{ matrix.ruby }}-${{ env.SANITIZED_GEMFILE }}
           path: coverage/*.json
@@ -89,12 +95,14 @@ jobs:
     needs: test
     if: success()
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       - name: Download coverage reports from the test job
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
 
-      - uses: qltysh/qlty-action/coverage@v2
+      - uses: qltysh/qlty-action/coverage@a19242102d17e497f437d7466aa01b528537e899 # v2.2.0
         with:
           token: ${{ secrets.QLTY_COVERAGE_TOKEN }}
           files: coverage-*/*.json
@@ -104,9 +112,11 @@ jobs:
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
         with:
           ruby-version: ruby
       - name: Build GEM