Bump github.com/urfave/cli/v2 from 2.5.1 to 2.6.0 (#428)

Bumps [github.com/urfave/cli/v2](https://github.com/urfave/cli) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/urfave/cli/releases)
- [Changelog](https://github.com/urfave/cli/blob/main/docs/CHANGELOG.md)
- [Commits](urfave/cli@v2.5.1...v2.6.0)

---
updated-dependencies:
- dependency-name: github.com/urfave/cli/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

go.mod

@@ -25,7 +25,7 @@ require (
 	github.com/shurcooL/githubv4 v0.0.0-20201206200315-234843c633fa
 	github.com/slack-go/slack v0.10.3
 	github.com/tidwall/gjson v1.14.1
-	github.com/urfave/cli/v2 v2.5.1
+	github.com/urfave/cli/v2 v2.6.0
 	go.uber.org/zap v1.21.0
 	golang.org/x/oauth2 v0.0.0-20220309155454-6242fa91716a
 	gopkg.in/h2non/gock.v1 v1.1.2