Rename libraries string from 'Open-source libraries' to 'Libraries'

Co-authored-by: ricky9667 <55730003+ricky9667@users.noreply.github.com>

Author: Copilot

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

@@ -17,7 +17,7 @@
     <string name="version">Version</string>
     <string name="version_unknown">Unknown Version</string>
     <string name="hush_keyboard_github">https://github.com/ricky9667/HushKeyboard</string>
-    <string name="libraries">Open-source libraries</string>
+    <string name="libraries">Libraries</string>
     <string name="donate">Donate</string>
     <string name="buy_me_a_coffee_url">https://coff.ee/ricky9667</string>