Update styfle/cancel-workflow-action action to v0.12.0

Author: renovate[bot]

.github/workflows/docker.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Cancel previous workflow
-        uses: styfle/cancel-workflow-action@0.11.0
+        uses: styfle/cancel-workflow-action@0.12.0
         with:
           access_token: ${{ github.token }}