Specify kotlin for CodeQL

Just because its semantically more correct. There's no difference
in terms of the actuall code scanning (java == kotlin for CodeQL).

Author: pcolby

.github/workflows/codeql.yaml

@@ -24,7 +24,7 @@ jobs:
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v3
       with:
-        languages: java
+        languages: kotlin
     - name: Autobuild
       uses: github/codeql-action/autobuild@v3
     - name: Perform CodeQL Analysis