Add changelog entries from botocore

Author: aws-sdk-python-automation

.changes/next-release/api-change-chimesdkidentity-38882.json

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+{
+  "type": "api-change",
+  "category": "``chime-sdk-identity``",
+  "description": "[``botocore``] The Amazon Chime SDK now supports push notifications through Amazon Pinpoint"
+}

.changes/next-release/api-change-chimesdkmessaging-91358.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``chime-sdk-messaging``",
+  "description": "[``botocore``] The Amazon Chime SDK now supports push notifications through Amazon Pinpoint"
+}

.changes/next-release/api-change-emrcontainers-55503.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``emr-containers``",
+  "description": "[``botocore``] This feature enables auto-generation of certificate  to secure the managed-endpoint and removes the need for customer provided certificate-arn during managed-endpoint setup."
+}