Changed wording for authentication

Reported at Transifex.

See https://www.transifex.com/nextcloud/nextcloud/translate/#de_DE/$/130098100?q=issue%3Aopen

Signed-off-by: Mark Ziegler <mark.ziegler@rakekniven.de>

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

@@ -72,7 +72,7 @@
     <string name="nc_settings_remove_account">Remove account</string>
     <string name="nc_settings_add_account">Add a new account</string>
     <string name="nc_settings_wrong_account">Only current account can be reauthorized</string>
-    <string name="nc_settings_no_talk_installed">Talk app is not installed on the server you tried to authorize against</string>
+    <string name="nc_settings_no_talk_installed">Talk app is not installed on the server you tried to authenticate against</string>
     <string name="nc_settings_account_updated">Your already existing account was updated, instead of adding a new one</string>
     <string name="nc_account_scheduled_for_deletion">The account is scheduled for deletion, and cannot be changed</string>
     <string name="nc_settings_notification_sounds">Notification sounds</string>