[MM-29108] Fix errcheck issues in server/channels/app/team.go (#30683)

Co-authored-by: Claude <noreply@anthropic.com>

server/.golangci.yml

@@ -101,7 +101,6 @@ issues:
         channels/app/platform/web_hub_test.go|\
         channels/app/slashcommands/command_test.go|\
         channels/app/slashcommands/helper_test.go|\
-        channels/app/team.go|\
         channels/app/team_test.go|\
         channels/app/upload.go|\
         channels/jobs/batch_worker_test.go|\