pin only major version, trying to fix the CI

Author: michaelosthege

.github/workflows/pipeline.yml

@@ -33,7 +33,7 @@ jobs:
         export NUMBA_DISABLE_JIT=1
         pytest --cov=./pyrff --cov-report xml --cov-report term-missing pyrff/
     - name: Upload coverage
-      uses: codecov/codecov-action@v1.0.7
+      uses: codecov/codecov-action@v1
       if: matrix.python-version == 3.8
       with:
         file: ./coverage.xml