Upgrade gssapi gem to version 1.3.1

What does this MR do and why?

Changlog of gssapi: https://github.com/zenchild/gssapi/blob/main/Changelog.md (it is incomplete - missing the 1.3.1 version)

Code changes: https://github.com/zenchild/gssapi/compare/v1.2.0...1.3.1

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How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

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