fs: for my sanity, begin tracking version where code was last checked for accuracy

libraries/libstratosphere/include/stratosphere/fs/fs_device_save_data.hpp

@@ -19,6 +19,7 @@
 
 namespace ams::fs {
 
+    /* ACCURATE_TO_VERSION: Unknown */
     Result MountDeviceSaveData(const char *name);
     Result MountDeviceSaveData(const char *name, const ncm::ApplicationId application_id);