chore(deps): update reviewdog/action-detect-secrets action to v0.21.0 (#22)

| datasource  | package                         | from    | to      |
| ----------- | ------------------------------- | ------- | ------- |
| github-tags | reviewdog/action-detect-secrets | v0.16.1 | v0.21.0 |

Author: stackable-bot

.github/workflows/reviewdog.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
-      - uses: reviewdog/action-detect-secrets@d26ae2fc9ee158d7cccb06ed5734d84a29420fed # tag=v0.16.1
+      - uses: reviewdog/action-detect-secrets@8827bf02944e7d1684d490c2361be0bf6c2d6e7d # v0.21.0
         with:
           github_token: ${{ secrets.github_token }}