rsh.c: typo fix

Example in a comment used a wrong environment variable.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/rsh.c b/rsh.c
index bad5cff..1fef6da 100644
--- a/rsh.c
+++ b/rsh.c
@@ -104,7 +104,7 @@
 	if (!path) {
 		return error("Bad URL: %s", url);
 	}
-	/* $GIT_RSH <host> "env GIR_DIR=<path> <remote_prog> <args...>" */
+	/* $GIT_RSH <host> "env GIT_DIR=<path> <remote_prog> <args...>" */
 	sizen = COMMAND_SIZE;
 	posn = command;
 	of = 0;