chore: add additional filter for backend check changes (#1170)

<!--- Provide a general summary of your changes in the Title above -->

## Description

<!--- Describe your changes in detail -->

## Related Issue(s)

- #{issue number}

## Verification

- [ ] **Your** code builds clean without any errors or warnings
- [ ] Manual testing done (required)
- [ ] Relevant automated test added (if you find this hard, leave it and
we'll help out)

## Documentation

- [ ] Documentation is updated (either in `docs`-directory, Altinnpedia
or a separate linked PR in
[altinn-studio-docs.](https://github.com/Altinn/altinn-studio-docs), if
applicable)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Chores**
- Expanded monitoring capabilities in GitHub Actions to include changes
in the `.azure/modules/containerApp` directory.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/action-check-for-changes.yml

@@ -47,6 +47,7 @@ jobs:
               - '.github/**/*'
               - 'src/**/*'
               - '.azure/applications/**/*'
+              - '.azure/modules/containerApp/**/*'
             tests:
               - 'tests/**/*'
             azure: