Documentation/config: fix replacement for --get-urlmatch

The documentation claims that --get-urlmatch is replaced by

  git config get --all --show-names --url=<URL> <name>

However, --url cannot be combined with --all, and this command
fails in practice.

Update the replacement to use only --url, which matches the
actual behavior of --get-urlmatch.

Signed-off-by: Pushkar Singh <pushkarkumarsingh1970@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: pushkarscripts

Documentation/git-config.adoc

@@ -317,7 +317,7 @@ recommended to migrate to the new syntax.
 	Replaced by `git config get --all --show-names --regexp <name-regexp>`.
 
 --get-urlmatch <name> <URL>::
-	Replaced by `git config get --all --show-names --url=<URL> <name>`.
+	Replaced by `git config get --url=<URL> <name>`.
 
 --get-color <name> [<default>]::
 	Replaced by `git config get --type=color [--default=<default>] <name>`.