CodeCov uploading sanity pass

- Upgrade action to v4.
- Add ReleaseNotes check to fail job if it doesn't detect the `codecov/project` check on the run in 15 minutes.
- Mark Upload Codecov Job as flaky.

.github/workflows/scripts/rerunFlakyTests.js

@@ -3,7 +3,8 @@
 const CONSIDERED_JOBS = [
 	"Windows Live Tests",
 	"Linux Live Tests",
-	"Build .deb Package"
+	"Build .deb Package",
+	"Upload Code Coverage"
 ];
 
 async function getFailedJobsForRun(github, context, workflowRunId, runAttempt) {