cmake dependency: Fix accidental use of T.Optional in warning message

09b53c534f seems to have done an over-eager search-replace.

mesonbuild/dependencies/cmake.py

@@ -525,7 +525,7 @@ class CMakeDependency(ExternalDependency):
         for i, required in modules:
             if i not in self.traceparser.targets:
                 if not required:
-                    mlog.warning('CMake: T.Optional module', mlog.bold(self._original_module_name(i)), 'for', mlog.bold(name), 'was not found')
+                    mlog.warning('CMake: Optional module', mlog.bold(self._original_module_name(i)), 'for', mlog.bold(name), 'was not found')
                     continue
                 raise self._gen_exception('CMake: invalid module {} for {}.\n'
                                           'Try to explicitly specify one or more targets with the "modules" property.\n'