chore(deps): bump gocloud.dev/pubsub/natspubsub from 0.42.0 to 0.43.0 (#7049)

Bumps [gocloud.dev/pubsub/natspubsub](https://github.com/google/go-cloud) from 0.42.0 to 0.43.0.
- [Release notes](https://github.com/google/go-cloud/releases)
- [Commits](https://github.com/google/go-cloud/compare/v0.42.0...v0.43.0)

---
updated-dependencies:
- dependency-name: gocloud.dev/pubsub/natspubsub
  dependency-version: 0.43.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -97,7 +97,7 @@ require (
 	go.mongodb.org/mongo-driver v1.17.4
 	go.opencensus.io v0.24.0 // indirect
 	gocloud.dev v0.43.0
-	gocloud.dev/pubsub/natspubsub v0.42.0
+	gocloud.dev/pubsub/natspubsub v0.43.0
 	gocloud.dev/pubsub/rabbitpubsub v0.43.0
 	golang.org/x/crypto v0.40.0
 	golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b
@@ -312,8 +312,8 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.40.1 // indirect
-	github.com/nats-io/nkeys v0.4.10 // indirect
+	github.com/nats-io/nats.go v1.43.0 // indirect
+	github.com/nats-io/nkeys v0.4.11 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/ncruces/go-strftime v0.1.9 // indirect
 	github.com/ncw/swift/v2 v2.0.4 // indirect