Fixed mastodon version injection into containers via github actions (#24873)

.github/workflows/build-image.yml

@@ -61,7 +61,7 @@ jobs:
         id: version_vars
         if: github.repository == 'mastodon/mastodon' && github.event_name == 'push' && github.ref_name == 'main'
         run: |
-          echo mastodon_version_suffix=\"+edge-$(git rev-parse --short HEAD)\" >> $GITHUB_OUTPUT
+          echo mastodon_version_suffix=+edge-$(git rev-parse --short HEAD) >> $GITHUB_OUTPUT
 
       - uses: docker/build-push-action@v4
         with:

.github/workflows/build-nightly.yml

@@ -44,7 +44,7 @@ jobs:
       - name: Generate version suffix
         id: version_vars
         run: |
-          echo mastodon_version_suffix=\"+nightly-$(date +'%Y%m%d')\" >> $GITHUB_OUTPUT
+          echo mastodon_version_suffix=+nightly-$(date +'%Y%m%d') >> $GITHUB_OUTPUT
 
       - uses: docker/build-push-action@v4
         with: