use java.util.Locale.ROOT

use Locale.ROOT in normalizeTextToLowercase() for consistent case folding

The search index and matching must be independent of the user's UI language.
Using BaseSettings.REVANCED_LANGUAGE.get().getLocale() can break case-insensitive
matching in certain locales (e.g., Turkish 'tr_TR' where 'İ'.toLowerCase() → 'i'
without dot, while 'i'.toUpperCase() → 'İ' — causing mismatches).

Locale.ROOT provides standardized, locale-neutral case conversion:
- 'İ' → 'i' (correct)
- 'ß' → 'ss'
- Consistent behavior across all languages

This ensures reliable search for Korean, Arabic, Vietnamese, and Latin scripts
regardless of the selected ReVanced language.

Fixes incorrect search behavior when UI language is Turkish, German, etc.

Author: MarcaDian

extensions/shared/library/src/main/java/app/revanced/extension/shared/Utils.java

@@ -994,9 +994,8 @@ public static String removePunctuationToLowercase(@Nullable CharSequence origina
      */
     public static String normalizeTextToLowercase(CharSequence original) {
         if (original == null) return "";
-        String normalized = Normalizer.normalize(original.toString(), Normalizer.Form.NFD);
-        return normalized.replaceAll("\\p{M}", "")
-                .toLowerCase(BaseSettings.REVANCED_LANGUAGE.get().getLocale());
+        return Normalizer.normalize(original.toString(), Normalizer.Form.NFD)
+                .replaceAll("\\p{M}", "").toLowerCase(Locale.ROOT);
     }
 
     /**