message: Update packages/dts-gen/docs/how-to-use.md
diff: @@ -23,7 +23,7 @@ $ kintone-dts-gen --host http://***.cybozu.com \
  -u username \
  -p password \
  --app-id 12 \
  - --type-name SampleFields
  + --type-name SampleFields \
  --namespace company.name.types \
  -o sample-fields.d.ts
  ```
  