Merge pull request #28184 from backstage/renovate/actions-upload-artifact-digest

chore(deps): update actions/upload-artifact digest to 6f51ac0

.github/workflows/api-breaking-changes.yml

@@ -46,7 +46,7 @@ jobs:
           cat ${{ github.event_path }} > event.json
 
       - name: Upload Artifacts
-        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
+        uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4
         with:
           name: preview-spec
           path: |

.github/workflows/deploy_microsite.yml

@@ -73,7 +73,7 @@ jobs:
         run: yarn build:api-docs
 
       - name: upload API reference
-        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
+        uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4
         with:
           name: stable-reference
           path: docs/reference/
@@ -113,7 +113,7 @@ jobs:
         run: yarn build:api-docs
 
       - name: upload API reference
-        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
+        uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4
         with:
           name: next-reference
           path: docs/reference/
@@ -130,7 +130,7 @@ jobs:
         working-directory: storybook
 
       - name: storybook upload
-        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
+        uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4
         with:
           name: storybook
           path: storybook/dist/