fix: github actions

Author: MeirionHughes

.github/workflows/coverage.yml

@@ -49,6 +49,18 @@ jobs:
           coverage/
           !coverage/tmp/
 
+    - name: Generate coverage badge
+      if: matrix.node-version == '20.x' && github.ref == 'refs/heads/master'
+      run: npx coverage-badges-cli --source coverage/coverage-summary.json --output coverage/badges.svg
+
+    - name: Upload coverage badge
+      if: matrix.node-version == '20.x' && github.ref == 'refs/heads/master'
+      uses: actions/upload-artifact@v4
+      with:
+        name: coverage-badge
+        path: coverage/badges.svg
+        retention-days: 1
+
     - name: Coverage Comment on PR
       if: matrix.node-version == '20.x' && github.event_name == 'pull_request'
       uses: romeovs/lcov-reporter-action@v0.3.1