Update module github.com/urfave/cli/v2 to v2.5.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/urfave/cli/v2	require	patch	v2.5.0 -> v2.5.1

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Release Notes

urfave/cli

### [`v2.5.1`](https://togithub.com/urfave/cli/releases/v2.5.1) [Compare Source](https://togithub.com/urfave/cli/compare/v2.5.0...v2.5.1) #### What's Changed - Cleaning up some release-related metadata & docs by [@​meatballhat](https://togithub.com/meatballhat) in [https://github.com/urfave/cli/pull/1371](https://togithub.com/urfave/cli/pull/1371) - Accept multi-value input on slice flags ([#​1241](https://togithub.com/urfave/cli/issues/1241)) by [@​meatballhat](https://togithub.com/meatballhat) in [https://github.com/urfave/cli/pull/1377](https://togithub.com/urfave/cli/pull/1377) - Accept multi-value input on slice flags by [@​vipally](https://togithub.com/vipally) in [https://github.com/urfave/cli/pull/1241](https://togithub.com/urfave/cli/pull/1241) **Full Changelog**: https://github.com/urfave/cli/compare/v2.5.0...v2.5.1

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