use public vanity API

[aronatkins]

rsconnect-ts/src/APIClient.ts

Lines 114 to 119 in 0724ec2

	public async updateAppVanityURL (appID: number, vanityURL: string): Promise<VanityRecordResponse> {
	return await this.client.post(
	`applications/${appID}/vanities`,
	{ app_id: appID, path_prefix: vanityURL }
	).then((resp: AxiosResponse) => keysToCamel(resp.data))
	}

The public PUT /__api__/v1/content/{guid}/vanity API has been available since Connect 1.8.6 (released in late 2020), which means that all supported versions of Connect have this API.

Update the API client to use the public vanity API.

Connect plans to remove this API in an upcoming release.