Use the proper name for Codecov

.github/workflows/main.yml

@@ -167,14 +167,12 @@ jobs:
 
     - name: Upload coverage
       if: matrix.use_coverage && github.repository == 'pytest-dev/pytest'
-      env:
-        CODECOV_NAME: ${{ matrix.name }}
       uses: codecov/codecov-action@v2
       with:
         files: ./coverage1.xml
         fail_ci_if_error: true
         env_vars: OS,PYTHON
-        name: pytest-codecov
+        name: ${{ matrix.name }}
         verbose: true
 
   linting: