Clarify what account linking does

Signed-off-by: Alex Saveau <[email protected]>

feature/settings/src/main/res/values/strings.xml

@@ -44,7 +44,9 @@
     <string name="settings_pref_reset_prefs_title">Reset preferences and tutorials</string>
 
     <string name="settings_pref_link_account_title">Link accounts</string>
-    <string name="settings_pref_link_account_summary">Merge two accounts into one</string>
+    <string name="settings_pref_link_account_summary">
+        Migrate this account\'s data into a new account and link them if possible.
+    </string>
 
     <string name="settings_pref_sign_out_title">Sign out</string>