Update README.md (#1283)

* Update README.md

Information added that mergerfs v2.35.0 and newer sets `allow_other` (but not 2.33.5, that is used by Debian 12.2)

README.md

@@ -307,8 +307,8 @@ These options are the same regardless of whether you use them with the
 * **splice_read**: deprecated - Does nothing.
 * **splice_write**: deprecated - Does nothing.
 * **splice_move**: deprecated - Does nothing.
-* **allow_other**: deprecated - mergerfs always sets this FUSE option
-  as normal permissions can be used to limit access.
+* **allow_other**: deprecated - mergerfs v2.35.0 and newer sets this FUSE option
+  automatically if running as root.
 * **use_ino**: deprecated - mergerfs should always control inode
   calculation so this is enabled all the time.