Enable syntax highlighting for CMakeLists.txt files #2199 (#4130)

modules/template/highlight/highlight.go

@@ -20,6 +20,7 @@ var (
 
 	// File names that are representing highlight classes.
 	highlightFileNames = map[string]bool{
+		"cmakelists.txt": true,
 		"dockerfile": true,
 		"makefile":   true,
 	}