Re-enable SonarCloud analysis on default branch (#1029)

This analysis was accidentally disabled by
ff3be8a.

.github/workflows/sonarcloud.yml

@@ -13,7 +13,7 @@ jobs:
   analyze:
     # Analysis of code in forked repositories is skipped, as such workflow runs
     # do not have access to the requisite secrets.
-    if: github.event.pull_request.head.repo.full_name == github.repository
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
     permissions:
       contents: read
     runs-on: ubuntu-22.04