Fix a typo

Closes #3077

PowerEditor/src/NppCommands.cpp

@@ -2659,11 +2659,11 @@ void Notepad_plus::command(int id)
 		case IDM_UPDATE_NPP :
 		case IDM_CONFUPDATERPROXY :
 		{
-			// wingup doesn't work with the obsolet security layer (API) under xp since downloadings are secured with SSL on notepad_plus_plus.org
+			// wingup doesn't work with the obsolete security layer (API) under xp since downloadings are secured with SSL on notepad_plus_plus.org
 			winVer ver = NppParameters::getInstance()->getWinVersion();
 			if (ver <= WV_XP)
 			{
-				long res = ::MessageBox(NULL, TEXT("Notepad++ updater is not compatible with XP due to the obsolet security layer under XP.\rDo you want to go to Notepad++ page to download the latest version?"), TEXT("Notepad++ Updater"), MB_YESNO);
+				long res = ::MessageBox(NULL, TEXT("Notepad++ updater is not compatible with XP due to the obsolete security layer under XP.\rDo you want to go to Notepad++ page to download the latest version?"), TEXT("Notepad++ Updater"), MB_YESNO);
 				if (res == IDYES)
 				{
 					::ShellExecute(NULL, TEXT("open"), TEXT("https://notepad-plus-plus.org/download/"), NULL, NULL, SW_SHOWNORMAL);