ci: fix missin Codecov token

.github/workflows/lint-and-tests.yml

@@ -5,23 +5,28 @@ name: "🐍 Lint and Test"
 # events but only for the master branch
 on:
   pull_request:
-    branches: [main]
+    branches:
+      - main
     paths-ignore:
       - "docs/**"
   push:
-    branches: [main]
+    branches:
+      - main
     paths-ignore:
       - "docs/**"
 
-# A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
-  # This workflow contains a single job called "build"
   lintest:
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -57,3 +62,10 @@ jobs:
 
       - name: Upload coverage to Codecov
         uses: codecov/[email protected]
+        with:
+          env_vars: PYTHON
+          flags: unittests
+          name: Code Coverage for unittests on python-${{ matrix.python-version }}]
+        env:
+          PYTHON: ${{ matrix.python-version }}
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}