Add Changelog entries for release

Author: leslitagordita

src/content/changelog/4-76-2020-09-21-2020.md

@@ -8,9 +8,24 @@ changelog:
 
 ### Added
 
-### Changed
+- When you have active [Domains](/api/v4/domains) on your [Account](/api/v4/account), but no active [Linodes](/api/v4/linode-instances), your domains are not served. The List Notifications ([GET /account/notifications](/api/v4/account-notifications)) endpoint now returns a notification to alert you when your Account falls under this case.
+
+- The [NodeBalancers endpoints](/api/v4/nodebalancers) error messages were improved to include information about a field's valid values.
 
 ### Fixed
 
+- The APIv4 now returns a warning when you execute a staged/approved PayPal payment ([POST /account/payments/paypal/execute](/api/v4/account-payments-paypal-execute/#post)) and your payment is successfully processed, but an error occurs related to releasing a service suspension. Prior to this fix, a `500` error occurred instead.
+
+- Now, when you have an outstanding balance on your account, adding more nodes to a Kubernetes Cluster fails. An error message with `Cannot add or create LKE objects with an outstanding balance on your account` is returned when this occurs. This affects the following endpoints:
+    - Create Kubernetes Cluster ([POST /lke/clusters](/api/v4/lke-clusters/#post))
+    - Create Node Pool ([POST /lke/clusters/{clusterId}/pools](/api/v4/lke-clusters-cluster-id-pools/#post))
+    - Update Node Pool ([PUT /lke/clusters/{clusterId}/pools/{poolId}](/api/v4/lke-clusters-cluster-id-pools-pool-id/#put))
+    - Recycle Node Pool endpoints. ([POST /lke/clusters/{clusterId}/pools/{poolId}/recycle](/api/v4/lke-clusters-cluster-id-pools-pool-id-recycle/#post))
+
+- When you attempt to create a Kubernetes cluster ([POST /lke/clusters](/api/v4/lke-clusters/#post)) or create a node pool ([POST /lke/clusters/{clusterId}/pools](/api/v4/lke-clusters-cluster-id-pools/#post)) with unsupported node types, you receive an error message. Currently, LKE does not support [1 GB Linode instances](https://www.linode.com/products/shared/), and [GPU Linode instances](https://www.linode.com/products/gpu/).
+
+- You can now [create an Object Storage Limited Access Key](/api/v4/object-storage-keys/#post) without access to any buckets. This is achieved by creating an Object Storage Key with an empty `bucket_access` array. This type of Limited Access Key can:
 
+    - [list all buckets](/api/v4/object-storage-buckets/) available on your Account, but cannot perform any actions on a bucket.
 
+    - [create new buckets](/api/v4/object-storage-buckets/#post), but does not have any access to the buckets it creates.