codeql: Add explicit permissions

Codeql requires write access to security-events, but our default action
token (rightly) only has read permissions.
This adds the explicit request for write access.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

.github/workflows/codeql-analysis.yml

@@ -14,6 +14,8 @@ jobs:
   analyze:
     name: Analyze
     runs-on: ubuntu-latest
+    permissions:
+      security-events: write
 
     strategy:
       fail-fast: false