Only scan JavaScript with CodeQL

Because the C# code is in LINQPad queries (.linq files),
which CodeQL does not appear able to scan.

.github/workflows/codeql.yml

@@ -32,7 +32,9 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: [ 'csharp', 'javascript' ]
+        # NOTE: I have manually removed 'csharp' because the C# code in this project is all in
+        # LINQPad queries (.linq files) and CodeQL does not appear to be able to scan such files.
+        language: [ 'javascript' ]
         # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
         # Use only 'java' to analyze code written in Java, Kotlin or both
         # Use only 'javascript' to analyze code written in JavaScript, TypeScript or both