Update Localizable.strings

typo of "cache". Made lowercase changes.

iOSClient/Supporting Files/en.lproj/Localizable.strings

@@ -101,8 +101,8 @@
 "_app_version_"             = "Application version";
 "_app_in_use_"              = "Application in use";
 "_contact_by_email_"        = "Contact us by email";
-"_clear_cache_"             = "Clear Cache (%@ used)";
-"_clear_cache_no_size_"     = "Clear Cache";
+"_clear_cache_"             = "Clear cache (%@ used)";
+"_clear_cache_no_size_"     = "Clear cache";
 "_exit_"                    = "Exit";
 "_funct_not_enabled_"       = "Functionality not enabled";
 "_passcode_activate_"       = "Password Lock activated";