Documentation: filesystems: overlayfs: drop doubled word

Drop the doubled word "the".
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: linux-unionfs@vger.kernel.org
Link: https://lore.kernel.org/r/20200703214325.31036-8-rdunlap@infradead.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/filesystems/overlayfs.rst

@@ -328,7 +328,7 @@ the time of copy (on-demand vs. up-front).
 Multiple lower layers
 ---------------------
 
-Multiple lower layers can now be given using the the colon (":") as a
+Multiple lower layers can now be given using the colon (":") as a
 separator character between the directory names.  For example:
 
   mount -t overlay overlay -olowerdir=/lower1:/lower2:/lower3 /merged