Update dependency boto3 to v1.21.3 (develop)

This MR contains the following updates:

Package	Type	Update	Change
boto3	dependencies	patch	==1.21.2 -> ==1.21.3

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Release Notes

boto/boto3

v1.21.3

Compare Source

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• api-change:transfer: [botocore] Properties for Transfer Family used with SFTP, FTP, and FTPS protocols. Display Banners are bodies of text that can be displayed before and/or after a user authenticates onto a server using one of the previously mentioned protocols.
• api-change:gamelift: [botocore] Increase string list limit from 10 to 100.
• api-change:budgets: [botocore] This change introduces DescribeBudgetNotificationsForAccount API which returns budget notifications for the specified account

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