build: Update codecov and use token

Update codecov to the latest version and start using the org-wide token for uploads.

See https://github.com/openedx/wg-frontend/issues/179

.github/workflows/ci.yml

@@ -25,4 +25,7 @@ jobs:
     - name: i18n_extract
       run: npm run i18n_extract
     - name: Coverage
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        fail_ci_if_error: true

.github/workflows/release.yml

@@ -29,7 +29,10 @@ jobs:
       - name: i18n_extract
         run: npm run i18n_extract
       - name: Coverage
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: false
       - name: Build
         run: npm run build
       - name: Release