chore(l10n): update Thai translations

Currently translated at 6.8% (3 of 44 strings)

Translation: Fossify/File-Manager
Translate-URL: https://hosted.weblate.org/projects/fossify/file-manager/th/
Via: Weblate

Author: Hosted Weblate user 143456

app/src/main/res/values-th/strings.xml

@@ -2,4 +2,5 @@
 <resources>
     <string name="images">รูปภาพ</string>
     <string name="videos">วิดีโอ</string>
+    <string name="audio">เสียง</string>
 </resources>