Fix a copypaste error in comment

Change-Id: Ic5272fe2e7226c5d6ccbb42c0b22635c2360200c
Reviewed-on: https://gerrit.libreoffice.org/71394Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Tested-by: Mike Kaganski <mike.kaganski@collabora.com>

comphelper/qa/unit/test_guards.cxx

@@ -50,7 +50,7 @@ CPPUNIT_TEST_FIXTURE(CppUnit::TestFixture, test_comphelperGuards)
         comphelper::FlagRestorationGuard aGuard(bFlag, false);
         CPPUNIT_ASSERT(!bFlag);
     }
-    // comphelper::FlagGuard must reset flag to initial state on destruction
+    // comphelper::FlagRestorationGuard must reset flag to initial state on destruction
     CPPUNIT_ASSERT(bFlag);
 }