Update docker/login-action digest to 4907a6d (#500)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build_test.yml

@@ -143,7 +143,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4
 
-      - uses: docker/login-action@b45d80f862d83dbcd57f89517bcf500b2ab88fb2 # v4
+      - uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4
         with:
           registry: ghcr.io
           username: ${{ github.actor }}