Bump build.buf:buf from 1.39.0 to 1.40.1

Bumps [build.buf:buf](https://github.com/bufbuild/buf) from 1.39.0 to 1.40.1.
- [Release notes](https://github.com/bufbuild/buf/releases)
- [Changelog](https://github.com/bufbuild/buf/blob/main/CHANGELOG.md)
- [Commits](bufbuild/buf@v1.39.0...v1.40.1)

---
updated-dependencies:
- dependency-name: build.buf:buf
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 assertj = "3.26.3"
-buf = "1.39.0"
+buf = "1.40.1"
 cel = "0.5.0"
 ipaddress = "5.5.1"
 junit = "5.11.0"