Updated project's threshold for code coverage in codecov.yml to compensate for the lower code coverage in LWC tests for now

Eventually, code coverage for LWC will be increased - but for now, the constant alerts from codecov.io aren't particularly helpful ^_^

Author: jongpie

.github/codecov.yml

@@ -3,8 +3,11 @@ coverage:
     project:
       default:
         target: 90%
-        threshold: 2%
+        threshold: 5%
         if_ci_failed: success
+        # The pipeline runs Apex and LWC tests as separate steps,
+        # so we need to wait for both to be uploaded before checking code coverage.
+        after_n_builds: 2
       Apex:
         target: 90%
         flags: