chore: run codecov gha on push to master branch to upload results to …

…codecov and benchmark

.github/workflows/codecov.yml

@@ -10,7 +10,9 @@ on:
 jobs:
   codecov:
     runs-on: ubuntu-latest
-    if: github.event.pull_request.head.repo.full_name == github.repository
+    if: |
+      github.event_name == 'push' ||
+      github.event.pull_request.head.repo.full_name == github.repository
     permissions:
       actions: write
       contents: write