chore(ci): bump coveralls action 2.2.3 -> 2.3.6 (dependabot pull request)

Author: rouilj

.github/workflows/ci-test.yml

@@ -331,7 +331,7 @@ jobs:
       - name: Upload coverage to Coveralls
         # python 2.7 and 3.6 versions of coverage can't produce lcov files.
         if: matrix.python-version != '2.7' && matrix.python-version != '3.6'
-        uses: coverallsapp/github-action@3dfc5567390f6fa9267c0ee9c251e4c8c3f18949 # v2.2.3
+        uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b # v2.3.6
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           path-to-lcov: coverage.lcov
@@ -367,7 +367,7 @@ jobs:
 
     steps:
       - name: Coveralls Finished
-        uses: coverallsapp/github-action@3dfc5567390f6fa9267c0ee9c251e4c8c3f18949 # v2.2.3
+        uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b # v2.3.6
         with:
           github-token: ${{ secrets.github_token }}
           parallel-finished: true