version 3.17.2

Changes

• #1232 Fix #1230 "unpack requires a buffer of 2 bytes" error when we have many options / option groups - Thanks @seratch @adamtheturtle

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• All issues/pull requests: https://github.com/slackapi/python-slack-sdk/milestone/61?closed=1
• All changes: v3.17.1...v3.17.2