Changes
* 1406 Add `RichTextInputElement` to `slack_sdk.models` - Thanks seratch
* 1408 Update `files.upload` v2 method in correspondence with server-side changes - Thanks seratch
Since this version, developers no longer need `files:read` permission for `files_upload_v2` method. To learn more about `files_upload_v2`, please refer to v3.19.0 release notes: https://github.com/slackapi/python-slack-sdk/releases/tag/v3.19.0
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* All issues/pull requests: https://github.com/slackapi/python-slack-sdk/milestone/84?closed=1
* All changes: https://github.com/slackapi/python-slack-sdk/compare/v3.22.0...v3.23.0