GHA: update/fix codecov config

Author: lafrech

.github/workflows/build-release.yaml

@@ -25,7 +25,9 @@ jobs:
           python -m pip install tox
           python -m tox -e${{ matrix.tox }}
       - name: Upload coverage
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.codecov_token }}
   build:
     name: Build package
     runs-on: ubuntu-latest

README.rst

@@ -18,7 +18,7 @@ BEMServer API
    :target: https://results.pre-commit.ci/latest/github/bemserver/bemserver-api/main
    :alt: pre-commit.ci status
 
-.. image:: https://codecov.io/gh/BEMServer/bemserver-api/branch/main/graph/badge.svg?token=4LRLMRA2S2
+.. image:: https://codecov.io/gh/BEMServer/bemserver-api/branch/main/graph/badge.svg
     :target: https://codecov.io/gh/bemserver/bemserver-api
     :alt: Code coverage