l10n: Correct spelling

Signed-off-by: Valdnet <47037905+Valdnet@users.noreply.github.com>

core/js/setupchecks.js

@@ -256,7 +256,7 @@
 					}
 					if (data.serverHasInternetConnectionProblems) {
 						messages.push({
-							msg: t('core', 'This server has no working Internet connection: Multiple endpoints could not be reached. This means that some of the features like mounting external storage, notifications about updates or installation of third-party apps will not work. Accessing files remotely and sending of notification emails might not work, either. Establish a connection from this server to the Internet to enjoy all features.'),
+							msg: t('core', 'This server has no working internet connection: Multiple endpoints could not be reached. This means that some of the features like mounting external storage, notifications about updates or installation of third-party apps will not work. Accessing files remotely and sending of notification emails might not work, either. Establish a connection from this server to the internet to enjoy all features.'),
 							type: OC.SetupChecks.MESSAGE_TYPE_WARNING
 						});
 					}