Tell CodeQL we're using Java 11 hopefully

.github/workflows/codeql-analysis.yml

@@ -36,6 +36,12 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v2
+      
+    - name: Setup Java JDK
+      uses: actions/setup-java@v1.4.3
+      with:
+        # The Java version to make available on the path. Takes a whole or semver Java version, or 1.x syntax (e.g. 1.8 => Java 8.x). Early access versions can be specified in the form of e.g. 14-ea, 14.0.0-ea, or 14.0.0-ea.28
+        java-version: 11
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL