Move back coveralls to v2.2

Author: rhugonnet

.github/workflows/python-tests.yml

@@ -116,7 +116,7 @@ jobs:
       run: coveragepy-lcov --data_file_path .coverage --output_file_path coverage.info
 
     - name: Upload coverage to Coveralls
-      uses: coverallsapp/github-action@master
+      uses: coverallsapp/github-action@v2.2
       with:
         github-token: ${{ secrets.github_token }}
         flag-name: run-${{ matrix.test_number }}
@@ -128,7 +128,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Upload to Coveralls finished
-      uses: coverallsapp/github-action@master
+      uses: coverallsapp/github-action@v2.2
       with:
         github-token: ${{ secrets.github_token }}
         parallel-finished: true