👷 Update templating workflow to use v1.0.0 (#1045)

## Description

This PR updates the templating workflow to use v1.0.0 of the action.

## Checklist:

- [x] The pull request only contains commits that are focused and
relevant to this change.
- [x] ~~I have added appropriate tests that cover the new/changed
functionality.~~
- [x] ~~I have updated the documentation to reflect these changes.~~
- [x] ~~I have added entries to the changelog for any noteworthy
additions, changes, fixes or removals.~~
- [x] ~~I have added migration instructions to the upgrade guide (if
needed).~~
- [x] The changes follow the project's style guidelines and introduce no
new warnings.
- [x] The changes are fully tested and pass the CI checks.
- [x] I have reviewed my own code changes.

Author: denialhaag

.github/workflows/templating.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           app-id: ${{ secrets.APP_ID }}
           private-key: ${{ secrets.APP_PRIVATE_KEY }}
-      - uses: munich-quantum-toolkit/templates@main
+      - uses: munich-quantum-toolkit/templates@a8866084f0336008b2d2727a34c9d27ec04694b6 # v1.0.0
         with:
           token: ${{ steps.create-token.outputs.token }}
           organization: ${{ github.repository_owner }}