fix(trivy): add kubectl-retina and retina-shell images to scan job (#…

…1044)

# Description

Add recently created images to trivy scan job

## Related Issue

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## Checklist

- [x] I have read the [contributing
documentation](https://retina.sh/docs/contributing).
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- [x] I have correctly attributed the author(s) of the code.
- [x] I have tested the changes locally.
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## Screenshots (if applicable) or Testing Completed

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## Additional Notes

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.github/workflows/trivy.yaml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        image: ["retina-agent", "retina-init", "retina-operator"]
+        image: ["retina-agent", "retina-init", "retina-operator", "kubectl-retina", "retina-shell"]
     runs-on: ubuntu-latest # trivy only supports running on Linux
     steps:
       - name: Checkout code