Update dependency boto3 to v1.21.46

This MR contains the following updates:

Package	Type	Update	Change
boto3	ironbank-pypi	patch	1.21.45 -> 1.21.46

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Release Notes

boto/boto3

v1.21.46

Compare Source

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• api-change:chime-sdk-meetings: [botocore] Include additional exceptions types.
• api-change:ec2: [botocore] Adds support for waiters that automatically poll for a deleted NAT Gateway until it reaches the deleted state.

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