build(deps): bump mvdan.cc/gofumpt from 0.8.0 to 0.9.0

Bumps [mvdan.cc/gofumpt](https://github.com/mvdan/gofumpt) from 0.8.0 to 0.9.0.
- [Release notes](https://github.com/mvdan/gofumpt/releases)
- [Changelog](https://github.com/mvdan/gofumpt/blob/master/CHANGELOG.md)
- [Commits](mvdan/gofumpt@v0.8.0...v0.9.0)

---
updated-dependencies:
- dependency-name: mvdan.cc/gofumpt
  dependency-version: 0.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

go.mod

@@ -139,7 +139,7 @@ require (
 	golang.org/x/tools v0.36.0
 	gopkg.in/yaml.v3 v3.0.1
 	honnef.co/go/tools v0.6.1
-	mvdan.cc/gofumpt v0.8.0
+	mvdan.cc/gofumpt v0.9.0
 	mvdan.cc/unparam v0.0.0-20250301125049-0df0534333a4
 )