Add security-experimental to codeql-config test

.github/codeql/codeql-config.yml

@@ -4,11 +4,13 @@ queries:
     uses: ./queries
   # Run all extra query suites, both because we want to
   # and because it'll act as extra testing. This is why
-  # we include both even though one is a superset of the
-  # other, because we're testing the parsing logic and
-  # that the suites exist in the codeql bundle.
+  # we include all three even though security-and-quality
+  # and security-experimental are supersets of
+  # security-extended, because we're testing the parsing 
+  # logic and that the suites exist in the codeql bundle.
   - uses: security-extended
   - uses: security-and-quality
+  - uses: security-experimental
 paths-ignore:
   - tests
   - lib