mergetool.txt: typofix 'overwriten' -> 'overwritten'

Signed-off-by: Noah Betzen <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: Nezteb

Documentation/config/mergetool.txt

@@ -50,7 +50,7 @@ mergetool.hideResolved::
 	possible and write the 'MERGED' file containing conflict markers around
 	any conflicts that it cannot resolve; 'LOCAL' and 'REMOTE' normally
 	represent the versions of the file from before Git's conflict
-	resolution. This flag causes 'LOCAL' and 'REMOTE' to be overwriten so
+	resolution. This flag causes 'LOCAL' and 'REMOTE' to be overwritten so
 	that only the unresolved conflicts are presented to the merge tool. Can
 	be configured per-tool via the `mergetool.<tool>.hideResolved`
 	configuration variable. Defaults to `false`.