[clangd] Fix typo in GUARDED_BY()

Reviewers: ilya-biryukov, kadircet, sammccall

Subscribers: javed.absar, MaskRay, jkorous, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D63193

llvm-svn: 363139

clang-tools-extra/clangd/TUScheduler.cpp

@@ -273,7 +273,7 @@ class ASTWorker {
   // The lifetime of the old/new ASTWorkers will overlap, but their handles
   // don't. When the old handle is destroyed, the old worker will stop reporting
   // diagnostics.
-  bool ReportDiagnostics = true; /* GUARDED_BY(DiagMu) */
+  bool ReportDiagnostics = true; /* GUARDED_BY(DiagsMu) */
 };
 
 /// A smart-pointer-like class that points to an active ASTWorker.