Modified Scan workflow to contain PR number during a PR (#718)

Author: mandreko-bitwarden

.github/workflows/scan.yml

@@ -75,3 +75,4 @@ jobs:
             -Dsonar.sources=.
             -Dsonar.test.inclusions=**/*.spec.ts
             -Dsonar.exclusions=**/*.spec.ts
+            -Dsonar.pullrequest.key=${{ github.event.pull_request.number }}