http2: fix tipo in comment

Change-Id: I821714084436f4d16c9a26ea09d1bdc8e78ceddf
Reviewed-on: https://go-review.googlesource.com/c/net/+/372134
Trust: Ian Lance Taylor <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Brad Fitzpatrick <[email protected]>

Author: ianlancetaylor

http2/server.go

@@ -722,7 +722,7 @@ func (sc *serverConn) canonicalHeader(v string) string {
 	// maxCachedCanonicalHeaders is an arbitrarily-chosen limit on the number of
 	// entries in the canonHeader cache. This should be larger than the number
 	// of unique, uncommon header keys likely to be sent by the peer, while not
-	// so high as to permit unreaasonable memory usage if the peer sends an unbounded
+	// so high as to permit unreasonable memory usage if the peer sends an unbounded
 	// number of unique header keys.
 	const maxCachedCanonicalHeaders = 32
 	if len(sc.canonHeader) < maxCachedCanonicalHeaders {