chore: update expected timezone from GMT+0 to UTC

Punic 3.2.0 added support for timezone translations and returns UTC instead of GMT+0 now.

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

tests/lib/L10N/L10nTest.php

@@ -118,20 +118,20 @@ class L10nTest extends TestCase {
 	public function localizationData() {
 		return [
 			// timestamp as string
-			['February 13, 2009 at 11:31:30 PM GMT+0', 'en', 'en_US', 'datetime', '1234567890'],
-			['13. Februar 2009 um 23:31:30 GMT+0', 'de', 'de_DE', 'datetime', '1234567890'],
+			['February 13, 2009 at 11:31:30 PM UTC', 'en', 'en_US', 'datetime', '1234567890'],
+			['13. Februar 2009 um 23:31:30 UTC', 'de', 'de_DE', 'datetime', '1234567890'],
 			['February 13, 2009', 'en', 'en_US', 'date', '1234567890'],
 			['13. Februar 2009', 'de', 'de_DE', 'date', '1234567890'],
-			['11:31:30 PM GMT+0', 'en', 'en_US', 'time', '1234567890'],
-			['23:31:30 GMT+0', 'de', 'de_DE', 'time', '1234567890'],
+			['11:31:30 PM UTC', 'en', 'en_US', 'time', '1234567890'],
+			['23:31:30 UTC', 'de', 'de_DE', 'time', '1234567890'],
 
 			// timestamp as int
-			['February 13, 2009 at 11:31:30 PM GMT+0', 'en', 'en_US', 'datetime', 1234567890],
-			['13. Februar 2009 um 23:31:30 GMT+0', 'de', 'de_DE', 'datetime', 1234567890],
+			['February 13, 2009 at 11:31:30 PM UTC', 'en', 'en_US', 'datetime', 1234567890],
+			['13. Februar 2009 um 23:31:30 UTC', 'de', 'de_DE', 'datetime', 1234567890],
 			['February 13, 2009', 'en', 'en_US', 'date', 1234567890],
 			['13. Februar 2009', 'de', 'de_DE', 'date', 1234567890],
-			['11:31:30 PM GMT+0', 'en', 'en_US', 'time', 1234567890],
-			['23:31:30 GMT+0', 'de', 'de_DE', 'time', 1234567890],
+			['11:31:30 PM UTC', 'en', 'en_US', 'time', 1234567890],
+			['23:31:30 UTC', 'de', 'de_DE', 'time', 1234567890],
 
 			// DateTime object
 			['February 13, 2009 at 11:31:30 PM GMT+0', 'en', 'en_US', 'datetime', new DateTime('@1234567890')],