Ensure correct CodeQL workflow permissions (open-telemetry#559)

Co-authored-by: otelbot <[email protected]>

Author: trask

.github/workflows/webserver.yml

@@ -199,6 +199,8 @@ jobs:
 
 
   Codeql-build:
+    permissions:
+      security-events: write # for github/codeql-action/analyze to upload SARIF results
     name: static-analysis
     runs-on: ubuntu-20.04
     steps: