errcheck issues fixed (#29065)

server/.golangci.yml

@@ -112,7 +112,6 @@ issues:
         channels/app/notification_push.go|\
         channels/app/notification_test.go|\
         channels/app/onboarding_test.go|\
-        channels/app/opengraph_test.go|\
         channels/app/permissions.go|\
         channels/app/permissions_test.go|\
         channels/app/platform/busy_test.go|\