MDL-37935: Cache - fix spelling mistake in language string

lang/en/cache.php

@@ -102,7 +102,7 @@
 $string['storeperformance'] = 'Cache store performance reporting - {$a} unique requests per operation.';
 $string['storeready'] = 'Ready';
 $string['storenotready'] = 'Store not ready';
-$string['storerequiresattention'] = 'Requries attention.';
+$string['storerequiresattention'] = 'Requires attention.';
 $string['storerequiresattention_help'] = 'This store instance is not ready to be used but has mappings. Fixing this issue will improve performance on your system. Please check that the store backend is ready to be used and that any PHP requirements are met.';
 $string['storeresults_application'] = 'Store requests when used as an application cache.';
 $string['storeresults_request'] = 'Store requests when used as a request cache.';