Bump github.com/buildkite/go-buildkite/v4 from 4.8.0 to 4.9.1

Bumps [github.com/buildkite/go-buildkite/v4](https://github.com/buildkite/go-buildkite) from 4.8.0 to 4.9.1.
- [Release notes](https://github.com/buildkite/go-buildkite/releases)
- [Changelog](https://github.com/buildkite/go-buildkite/blob/main/CHANGELOG.md)
- [Commits](buildkite/go-buildkite@v4.8.0...v4.9.1)

---
updated-dependencies:
- dependency-name: github.com/buildkite/go-buildkite/v4
  dependency-version: 4.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/AlecAivazis/survey/v2 v2.3.7
 	github.com/MakeNowJust/heredoc v1.0.0
 	github.com/alecthomas/kong v1.12.1
-	github.com/buildkite/go-buildkite/v4 v4.8.0
+	github.com/buildkite/go-buildkite/v4 v4.9.1
 	github.com/charmbracelet/bubbles v0.21.1-0.20250623103423-23b8fd6302d7
 	github.com/charmbracelet/bubbletea v1.3.10
 	github.com/charmbracelet/huh v0.8.0

go.sum

@@ -47,8 +47,8 @@ github.com/bmatcuk/doublestar/v4 v4.6.1 h1:FH9SifrbvJhnlQpztAx++wlkk70QBf0iBWDwN
 github.com/bmatcuk/doublestar/v4 v4.6.1/go.mod h1:xBQ8jztBU6kakFMg+8WGxn0c6z1fTSPVIjEY1Wr7jzc=
 github.com/bradleyjkemp/cupaloy/v2 v2.6.0 h1:knToPYa2xtfg42U3I6punFEjaGFKWQRXJwj0JTv4mTs=
 github.com/bradleyjkemp/cupaloy/v2 v2.6.0/go.mod h1:bm7JXdkRd4BHJk9HpwqAI8BoAY1lps46Enkdqw6aRX0=
-github.com/buildkite/go-buildkite/v4 v4.8.0 h1:rF9m7+vki1KQJPmT3D4R/zKnaGbhVMnXGRtBW3TknoI=
-github.com/buildkite/go-buildkite/v4 v4.8.0/go.mod h1:DlebrRJqpZttXDjCW+MJ1QyW9AN++ZWt/UbPtKdbSSk=
+github.com/buildkite/go-buildkite/v4 v4.9.1 h1:dA32pinTsHMTCHO84awc9W9Y21knlPjd/ZOSntMPIb0=
+github.com/buildkite/go-buildkite/v4 v4.9.1/go.mod h1:DlebrRJqpZttXDjCW+MJ1QyW9AN++ZWt/UbPtKdbSSk=
 github.com/catppuccin/go v0.3.0 h1:d+0/YicIq+hSTo5oPuRi5kOpqkVA5tAsU6dNhvRu+aY=
 github.com/catppuccin/go v0.3.0/go.mod h1:8IHJuMGaUUjQM82qBrGNBv7LFq6JI3NnQCF6MOlZjpc=
 github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEet03Pg2g16Swow4=