Fix spelling errors in code comments

Reported-by: Jens Schleusener <Jens.Schleusener@fossies.org>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 0c345b5..c0f1b64 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -1400,7 +1400,7 @@ static int do_fetch(struct transport *transport,
 
 		/*
 		 * We're setting the upstream configuration for the
-		 * current branch. The relevent upstream is the
+		 * current branch. The relevant upstream is the
 		 * fetched branch that is meant to be merged with the
 		 * current one, i.e. the one fetched to FETCH_HEAD.
 		 *