[GH-19267] Spelling comments (#19268)

* spelling: comments

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

api4/webhook_test.go

@@ -752,7 +752,7 @@ func TestUpdateIncomingHook(t *testing.T) {
 	th.App.UpdateConfig(func(cfg *model.Config) { *cfg.ServiceSettings.EnablePostIconOverride = false })
 
 	th.TestForSystemAdminAndLocal(t, func(t *testing.T, client *model.Client4) {
-		// webhook creations are allways performed by a sysadmin
+		// webhook creations are always performed by a sysadmin
 		// because it's not currently possible to create a webhook via
 		// local mode
 		var err error