Apply suggestions from code review

Co-authored-by: Zhiwei Liang <121905282+zliang-akamai@users.noreply.github.com>

Author: zliang-akamai

.github/workflows/e2e-test.yml

@@ -241,7 +241,7 @@ jobs:
     steps:
       - name: Notify Slack
         id: main_message
-        uses: slackapi/slack-github-action@v3.0.1
+        uses: slackapi/slack-github-action@v3
         with:
           method: chat.postMessage
           token: ${{ secrets.SLACK_BOT_TOKEN }}
@@ -273,7 +273,7 @@ jobs:
 
       - name: Test summary thread
         if: success()
-        uses: slackapi/slack-github-action@v3.0.1
+        uses: slackapi/slack-github-action@v3
         with:
           method: chat.postMessage
           token: ${{ secrets.SLACK_BOT_TOKEN }}

.github/workflows/nightly-smoke-tests.yml

@@ -45,7 +45,7 @@ jobs:
 
       - name: Notify Slack
         if: always() && github.repository == 'linode/linode_api4-python'
-        uses: slackapi/slack-github-action@v3.0.1
+        uses: slackapi/slack-github-action@v3
         with:
           method: chat.postMessage
           token: ${{ secrets.SLACK_BOT_TOKEN }}

.github/workflows/release-notify-slack.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
       - name: Notify Slack - Main Message
         id: main_message
-        uses: slackapi/slack-github-action@v3.0.1
+        uses: slackapi/slack-github-action@v3
         with:
           method: chat.postMessage
           token: ${{ secrets.SLACK_BOT_TOKEN }}