fixed comment typo (#19944)

Author: xkcdstickfigure

routers/web/web.go

@@ -126,7 +126,7 @@ func Routes() *web.Route {
 	routes.Route("/avatars/*", "GET, HEAD", storageHandler(setting.Avatar.Storage, "avatars", storage.Avatars))
 	routes.Route("/repo-avatars/*", "GET, HEAD", storageHandler(setting.RepoAvatar.Storage, "repo-avatars", storage.RepoAvatars))
 
-	// for health check - doeesn't need to be passed through gzip handler
+	// for health check - doesn't need to be passed through gzip handler
 	routes.Head("/", func(w http.ResponseWriter, req *http.Request) {
 		w.WriteHeader(http.StatusOK)
 	})