build(deps): bump mvdan.cc/gofumpt from 0.2.0 to 0.2.1 (#2427)

Bumps [mvdan.cc/gofumpt](https://github.com/mvdan/gofumpt) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/mvdan/gofumpt/releases)
- [Changelog](https://github.com/mvdan/gofumpt/blob/master/CHANGELOG.md)
- [Commits](mvdan/gofumpt@v0.2.0...v0.2.1)

---
updated-dependencies:
- dependency-name: mvdan.cc/gofumpt
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

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

go.mod

@@ -95,7 +95,7 @@ require (
 	golang.org/x/tools v0.1.8
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 	honnef.co/go/tools v0.2.2
-	mvdan.cc/gofumpt v0.2.0
+	mvdan.cc/gofumpt v0.2.1
 	mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed
 	mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b // indirect
 	mvdan.cc/unparam v0.0.0-20210104141923-aac4ce9116a7