Small code style changes in keyboard change logic

Author: Yusyuriv

Flow.Launcher.Infrastructure/Win32Helper.cs

@@ -464,19 +464,18 @@ private static string GetLanguageTag(uint langId)
             // https://github.com/dotnet/winforms/pull/8573#issuecomment-1542600949
             //
             // NOTE: this logic may break in future versions of Windows since it is not documented.
-            if (langId is (int)PInvoke.LOCALE_TRANSIENT_KEYBOARD1
-                or (int)PInvoke.LOCALE_TRANSIENT_KEYBOARD2
-                or (int)PInvoke.LOCALE_TRANSIENT_KEYBOARD3
-                or (int)PInvoke.LOCALE_TRANSIENT_KEYBOARD4)
+            if (langId is PInvoke.LOCALE_TRANSIENT_KEYBOARD1
+                or PInvoke.LOCALE_TRANSIENT_KEYBOARD2
+                or PInvoke.LOCALE_TRANSIENT_KEYBOARD3
+                or PInvoke.LOCALE_TRANSIENT_KEYBOARD4)
             {
-                using RegistryKey key = Registry.CurrentUser.OpenSubKey(UserProfileRegistryPath);
-                if (key is not null && key.GetValue("Languages") is string[] languages)
+                using var key = Registry.CurrentUser.OpenSubKey(UserProfileRegistryPath);
+                if (key?.GetValue("Languages") is string[] languages)
                 {
                     foreach (string language in languages)
                     {
-                        using RegistryKey subKey = key.OpenSubKey(language);
-                        if (subKey is not null
-                            && subKey.GetValue("TransientLangId") is int transientLangId
+                        using var subKey = key.OpenSubKey(language);
+                        if (subKey?.GetValue("TransientLangId") is int transientLangId
                             && transientLangId == langId)
                         {
                             return language;