build(deps): bump FranzDiebold/github-env-vars-action

Bumps [FranzDiebold/github-env-vars-action](https://github.com/franzdiebold/github-env-vars-action) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/franzdiebold/github-env-vars-action/releases)
- [Commits](FranzDiebold/github-env-vars-action@v2.7.0...v2.8.0)

---
updated-dependencies:
- dependency-name: FranzDiebold/github-env-vars-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/publish.yml

@@ -22,7 +22,7 @@ jobs:
 
       - name: Set up context
         id: project_context
-        uses: FranzDiebold/github-env-vars-action@v2.7.0
+        uses: FranzDiebold/github-env-vars-action@v2.8.0
 
       - name: Extract metadata (tags, labels) for Docker
         id: docker_metadata