fix: use consistent naming

Author: naveensingh

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

@@ -31,7 +31,7 @@
     <string name="show_clipboard_content">Show clipboard content if available</string>
     <string name="show_popup">Show a popup on keypress</string>
     <string name="vibrate_on_keypress">Vibrate on keypress</string>
-    <string name="sound_on_keypress">Keypress sound</string>
+    <string name="sound_on_keypress">Sound on keypress</string>
     <string name="sound_none">Off</string>
     <string name="sound_system">Follow system</string>
     <string name="sound_always">Always on</string>