Update dependency boto3 to v1.23.6

This MR contains the following updates:

Package	Type	Update	Change
boto3	ironbank-pypi	patch	1.23.5 -> 1.23.6

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Release Notes

boto/boto3

v1.23.6

Compare Source

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• api-change:elasticache: [botocore] Added support for encryption in transit for Memcached clusters. Customers can now launch Memcached cluster with encryption in transit enabled when using Memcached version 1.6.12 or later.
• api-change:forecast: [botocore] New APIs for Monitor that help you understand how your predictors perform over time.
• api-change:personalize: [botocore] Adding modelMetrics as part of DescribeRecommender API response for Personalize.

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