chore(deps): update reviewdog/action-shellcheck action to v1.20.0 (#24)

| datasource  | package                     | from    | to      |
| ----------- | --------------------------- | ------- | ------- |
| github-tags | reviewdog/action-shellcheck | v1.19.0 | v1.20.0 |

Author: stackable-bot

.github/workflows/reviewdog.yml

@@ -49,7 +49,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
-      - uses: reviewdog/action-shellcheck@96fa305c16b0f9cc9b093af22dcd09de1c8f1c2d # tag=v1.19.0
+      - uses: reviewdog/action-shellcheck@72365a51bf6476fe952a117c3ff703eb7775e40a # v1.20.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}