chore(l10n): update English (United Kingdom) translations

Currently translated at 4.5% (2 of 44 strings)

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

Author: Eatham1

app/src/main/res/values-en-rGB/strings.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <string name="app_launcher_name">File Manager</string>
+    <string name="invert_colors">Invert colours</string>
 </resources>