fix(deps): update module cloud.google.com/go/pubsub to v1.50.1

Author: renovate[bot]

go.mod

@@ -6,7 +6,7 @@ toolchain go1.23.6
 
 require (
 	cloud.google.com/go/iam v1.5.2
-	cloud.google.com/go/pubsub v1.49.0
+	cloud.google.com/go/pubsub v1.50.1
 	github.com/onsi/ginkgo/v2 v2.25.3
 	github.com/onsi/gomega v1.38.2
 	google.golang.org/api v0.248.0