Update coverallsapp/github-action action to v2.3.8

Author: renovate[bot]

.github/workflows/example_package_project-ci.yaml

@@ -32,7 +32,7 @@ jobs:
         run: pytest --cov example_package --cov-report term-missing --cov-append .
 
       - name: Coveralls GitHub Action
-        uses: coverallsapp/github-action@5cbfd81b66ca5d10c19b062c04de0199c215fb6e # v2.3.7
+        uses: coverallsapp/github-action@8d6379e14d29928660c4ba802d8e85393440b329 # v2.3.8
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           parallel: true