NFC: fix typo in clang/test/AST/ast-dump-templates.cpp

Author: mizvekov

clang/test/AST/ast-dump-templates.cpp

@@ -176,7 +176,7 @@ namespace TestDependentMemberPointer {
 // DUMP-NEXT:    `-MemberPointerType {{.+}} 'int U::template V<int>::*' dependent
 // DUMP-NEXT:      |-DependentTemplateSpecializationType {{.+}} 'U::template V<int>' dependent
 // DUMP-NEXT:      `-BuiltinType {{.+}} 'int'
-} // namespoace TestDependentMemberPointer
+} // namespace TestDependentMemberPointer
 
 // NOTE: CHECK lines have been autogenerated by gen_ast_dump_json_test.py