Fix typo.

Author: Maikuolan

src/pages/cache-data.php

@@ -40,8 +40,8 @@
 
 /**
  * In case APCu is available but isn't the primary caching source (doing this
- * for APCu but not the others, as the others would potentially require
- * connecting to server, which may or may not be desirable to the user, whereas
+ * for APCu but not the others, as the others would potentially require a
+ * server connection, which may or may not be desirable to the user, whereas
  * APCu data should be immediately available if the extension is available at
  * all).
  */