Fix capitalizatino of skin name for User:Preferences

foreground.php

@@ -22,7 +22,7 @@ $wgExtensionCredits['skin'][] = array(
     'descriptionmsg' => 'A MediaWiki skin that focuses on putting your content in the foreground.',
 );
 
-$wgValidSkinNames['foreground'] = 'foreground';
+$wgValidSkinNames['foreground'] = 'Foreground';
 
 $wgAutoloadClasses['Skinforeground'] = __DIR__.'/foreground.skin.php';
 
@@ -51,4 +51,4 @@ $wgResourceModules['skins.foreground'] = array(
     ),
     'remoteBasePath' => &$GLOBALS['wgStylePath'],
     'localBasePath'  => &$GLOBALS['wgStyleDirectory']
-);
+);