Add API v4.89.0 Changelog (linode#370)

* Add API v4.89.0 Changelog

Author: bbiggerr

src/content/changelog/4-89-0-2021-04-05.md

@@ -0,0 +1,24 @@
+---
+title: '4.89.0: 2021-04-05'
+date: 2021-04-05T04:00:00.000Z
+version: 4.89.0
+changelog:
+  - API
+---
+
+### Added
+
+- The VLANs List ([GET /networking/vlans](https://www.linode.com/docs/api/networking/#vlans-list)) beta endpoint has been added. VLANs provide a mechanism for secure communication between two or more Linodes that are assigned to the same VLAN and are both within the same Layer 2 broadcast domain. VLANs can be created and attached to Linodes by using the new `interfaces` property at the following endpoints:
+  - Linode Create ([POST /linode/instances](https://www.linode.com/docs/api/linode-instances/#linode-create))
+  - Configuration Profile Create ([POST /linode/instances/{linodeId}/configs](https://www.linode.com/docs/api/linode-instances/#configuration-profile-create))
+  - Configuration Profile Update ([PUT /linode/instances/{linodeId}/configs/{configId}](https://www.linode.com/docs/api/linode-instances/#configuration-profile-update))
+
+### Changed
+
+- The Account Update ([PUT /account](https://www.linode.com/docs/api/account/#account-update)) endpoint `zip` property has been updated with new restrictions. Previously, the `zip` only had a 16 character limit. Now, `zip` may only consist of letters, numbers, spaces, and hyphens, and must not contain more than 9 letter or number characters. These conditions must also be satisfied when accessing the Credit Card Add/Edit ([POST /account/credit-card](https://www.linode.com/docs/api/account/#credit-card-addedit)) endpoint.
+
+### Fixed
+
+- Previously, users without read-write access to Longview Clients could still access their `api_key` and `install_code` when accessing the Longview Clients List ([GET /longview/clients](https://www.linode.com/docs/api/longview/#longview-clients-list)) and Longview Client View ([GET /longview/clients/{clientId}](https://www.linode.com/docs/api/longview/#longview-client-view)) endpoints. Now, `[REDACTED]` is returned for these properties for users without read-write access to the associated Longview Clients.
+
+- Previously, the `label` property for the Linode Create ([POST /linode/instances](https://www.linode.com/docs/api/linode-instances/#linode-create)) request body schema lacked a type specification and restriction. The endpoint's request body schema has been refactored to include the `string` type specification and the restriction that Linode labels must end with an alphanumeric character.