Add security-experimental to codeql-config.yml (#1566)

Author: angelapwen

.github/codeql/codeql-config.yml

@@ -7,6 +7,7 @@ queries:
   # 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.
+  - uses: security-experimental
   - uses: security-extended
   - uses: security-and-quality
 paths-ignore: