Translate the os-prober label in the bootloader preview

Reuse the existing 'Detect other operating systems' msgid so the
preview matches the menu item label and stays localizable, like the
neighbouring Removable and Plymouth labels. Suggested in PR review.

archinstall/lib/models/bootloader.py

@@ -162,7 +162,7 @@ class BootloaderConfiguration(SubConfig):
 				os_prober_string = tr('Enabled')
 			else:
 				os_prober_string = tr('Disabled')
-			text += f'os-prober: {os_prober_string}'
+			text += f'{tr("Detect other operating systems")}: {os_prober_string}'
 			text += '\n'
 		if self.plymouth is not None:
 			text += f'{tr("Plymouth")}: {self.plymouth.value}'