Update changelog based on model updates

Author: aws-sdk-python-automation

.changes/next-release/api-change-grafana-12219.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``grafana``",
+  "description": "This release includes support for configuring a Grafana workspace to connect to a datasource within a VPC as well as new APIs for configuring Grafana settings."
+}

.changes/next-release/api-change-rbin-2942.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``rbin``",
+  "description": "This release adds support for Rule Lock for Recycle Bin, which allows you to lock retention rules so that they can no longer be modified or deleted."
+}