Add changelog entries from botocore

Author: aws-sdk-python-automation

.changes/next-release/api-change-acmpca-39834.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``acm-pca``",
+  "description": "[``botocore``] Updating service name entities"
+}

.changes/next-release/api-change-medialive-16885.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``medialive``",
+  "description": "[``botocore``] This release adds support for selecting a maintenance window."
+}