Update module github.com/spf13/cobra to v1.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/spf13/cobra	require	patch	v1.2.0 -> v1.2.1

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Release Notes

spf13/cobra

### [`v1.2.1`](https://togithub.com/spf13/cobra/releases/v1.2.1) [Compare Source](https://togithub.com/spf13/cobra/compare/v1.2.0...v1.2.1) ##### Bug fixes - Quickfix for https://github.com/spf13/cobra/issues/1437 after v1.2.0 where parallel use of the `cmd.RegisterFlagCompletionFunc()` (and subsequent map) now works correctly and flag completions now work again

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[mergify[bot]]

Nice! PR successfully merged.