message: Fixes help desc. spo site set. Closes
diff: @@ -550,7 +550,7 @@ class SpoSiteSetCommand extends SpoCommand {
  ${this.name} --url https://contoso.sharepoint.com/sites/sales --title "My new site"
  Restrict external sharing to already available external users only
  - ${this.name} --url https://contoso.sharepoint.com/sites/sales --sharingCapabilities ExternalUserSharingOnly
  + ${this.name} --url https://contoso.sharepoint.com/sites/sales --sharingCapability ExternalUserSharingOnly
  `);
  }
  }
  