chore(deps): bump gocloud.dev/pubsub/natspubsub from 0.39.0 to 0.40.0 (#6198)

Bumps [gocloud.dev/pubsub/natspubsub](https://github.com/google/go-cloud) from 0.39.0 to 0.40.0.
- [Release notes](https://github.com/google/go-cloud/releases)
- [Commits](https://github.com/google/go-cloud/compare/v0.39.0...v0.40.0)

---
updated-dependencies:
- dependency-name: gocloud.dev/pubsub/natspubsub
  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>

go.mod

@@ -100,7 +100,7 @@ require (
 	go.mongodb.org/mongo-driver v1.16.0
 	go.opencensus.io v0.24.0 // indirect
 	gocloud.dev v0.40.0
-	gocloud.dev/pubsub/natspubsub v0.39.0
+	gocloud.dev/pubsub/natspubsub v0.40.0
 	gocloud.dev/pubsub/rabbitpubsub v0.40.0
 	golang.org/x/crypto v0.28.0 // indirect
 	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56