Specific version for styfle/cancel-workflow-action

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
       # Cancel ongoing CI test runs if pushing to branch again before the previous tests
       # have finished
       - name: Cancel ongoing test runs for previous commits
-        uses: styfle/cancel-workflow-action@0.12
+        uses: styfle/cancel-workflow-action@0.12.1
         with:
           access_token: ${{ github.token }}
 
@@ -56,7 +56,7 @@ jobs:
       # Cancel ongoing documentation build if pushing to branch again before the previous
       # build is finished.
       - name: Cancel ongoing documentation builds for previous commits
-        uses: styfle/cancel-workflow-action@0.12
+        uses: styfle/cancel-workflow-action@0.12.1
         with:
           access_token: ${{ github.token }}