Update permissions section syno guide

Added a note to permission section in case someone decides to copy files from an old library into new library.

docs/Hardlinks/How-to-setup-for/Synology.md

@@ -286,7 +286,9 @@ Now we need to make sure that the newly created files and folders have the corre
 sudo chown -R docker:users /volume1/data /volume1/docker
 sudo chmod -R a=,a+rX,u+w,g+w /volume1/data /volume1/docker
 ```
-
+!!! note
+    If you copy files from a different library into the newly created library, you need to rerun these commands. !!!
+    
 ------
 
 ## Run the Docker Compose