chore(l10n): update Welsh translations

Currently translated at 70.2% (177 of 252 strings)

Translation: Fossify/Gallery
Translate-URL: https://hosted.weblate.org/projects/fossify/gallery/cy/
Via: Weblate

Author: fin-w

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

@@ -152,7 +152,7 @@
     <string name="allow_deep_zooming_images">Galluogi chwyddo dwfn ar ddelweddau</string>
     <string name="folder_thumbnail_style">Arddull cryno-lun ffolder</string>
     <string name="show_file_count_none">Peidio â dangos cyfanswm ffeiliau</string>
-    <string name="failed_to_load_media">Wedi methu â llwytho cyfryngau</string>
+    <string name="failed_to_load_media">Wedi methu â llwytho cyfryngau.</string>
     <string name="file_edited_successfully">Wedi golygu\'r ffeil yn llwyddiannus</string>
     <string name="group_direct_subfolders">Grwpio is-ffolderi uniongyrchol</string>
     <string name="autoplay_videos">Chwarae fideos yn awtomatig</string>
@@ -177,4 +177,4 @@
     <string name="allow_down_gesture">Caniatáu cau\'r olyg sgrin lawn gydag ystum i lawr</string>
     <string name="avoid_showing_invalid_files">Osgoi dangos ffeiliau annilys</string>
     <string name="show_file_count_line">Dangos nifer y ffeiliau ar ei linell ei hunan</string>
-</resources>
+</resources>