Adjust capitalization in timezone reconciliation dialog

Summary:
Use regular sentence casing for a text that's not a title.

Follow-up of D25420.

Test Plan:
- Change your browser or operating system timezone to differ from the timezone in your Phorge settings
- Click the notice that Phorge shows at the bottom left about the timezone mismatch
- Confirm that the "ignore new setting" checkbox label has been changed as per the diff in this revision

Reviewers: valerio.bozzolan, aklapper, O1 Blessed Committers

Reviewed By: valerio.bozzolan, O1 Blessed Committers

Subscribers: tobiaswiese, Matthew, Cigaryno

Differential Revision: https://we.phorge.it/D25986

src/applications/settings/controller/PhabricatorSettingsTimezoneController.php

@@ -105,7 +105,7 @@ final class PhabricatorSettingsTimezoneController
           ->addCheckbox(
               'ignoreConflict',
               1,
-              pht('Ignore New Setting and Keep %s', $current_zone_identifier)));
+              pht('Ignore new setting and keep %s', $current_zone_identifier)));
 
 
     return $this->newDialog()