message: change appId: 1 to app id.
diff: @@ -60,7 +60,7 @@ The YAML file must include the following information. Please note that the
  indentation for the `privateKey` is required.
  ```yaml
  -appId: 1
  +appId: app id
  clientId: client id
  clientSecret: client secret
  webhookSecret: webhook secret
  @@ -95,7 +95,7 @@ If you want to limit the GitHub app installations visible to backstage you may
  optionally include the `allowedInstallationOwners` option.
  ```yaml
  -appId: 1
  +appId: app id
  allowedInstallationOwners: ['GlobexCorp']
  clientId: client id
  clientSecret: client secret
  