update manpage

man/mergerfs.1

@@ -220,7 +220,7 @@ T}@T{
 Given the order of the drives, as defined at mount time or when
 configured via the xattr interface, act on the first one found where the
 path already exists.
-For \f[B]create\f[] cateogry it will exclude readonly drives and those
+For \f[B]create\f[] category it will exclude readonly drives and those
 with free space less than \f[B]minfreespace\f[] (unless there is no
 other option).
 Falls back to \f[B]ff\f[].