[clang][NFC] Fix typo in comment about Mac Catalyst

Author: ldionne

clang/lib/Driver/ToolChains/Darwin.cpp

@@ -2073,7 +2073,7 @@ std::optional<DarwinPlatform> getDeploymentTargetFromTargetArg(
         continue;
       A->claim();
       // Accept a -target-variant triple when compiling code that may run on
-      // macOS or Mac Catalust.
+      // macOS or Mac Catalyst.
       if ((Triple.isMacOSX() && TVT.getOS() == llvm::Triple::IOS &&
            TVT.isMacCatalystEnvironment()) ||
           (TVT.isMacOSX() && Triple.getOS() == llvm::Triple::IOS &&