fix(deps): update module cloud.google.com/go/pubsub to v2

Author: renovate-bot

gcp/indexer/go.mod

@@ -5,6 +5,7 @@ go 1.25.7
 require (
 	cloud.google.com/go/datastore v1.22.0
 	cloud.google.com/go/pubsub v1.50.1
+	cloud.google.com/go/pubsub/v2 v2.4.0
 	cloud.google.com/go/storage v1.59.2
 	github.com/go-git/go-git/v5 v5.16.5
 	github.com/golang/glog v1.2.5
@@ -22,7 +23,6 @@ require (
 	cloud.google.com/go/compute/metadata v0.9.0 // indirect
 	cloud.google.com/go/iam v1.5.3 // indirect
 	cloud.google.com/go/monitoring v1.24.3 // indirect
-	cloud.google.com/go/pubsub/v2 v2.0.0 // indirect
 	dario.cat/mergo v1.0.0 // indirect
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.30.0 // indirect
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/metric v0.54.0 // indirect

gcp/indexer/go.sum

@@ -25,6 +25,8 @@ cloud.google.com/go/pubsub v1.50.1 h1:fzbXpPyJnSGvWXF1jabhQeXyxdbCIkXTpjXHy7xviB
 cloud.google.com/go/pubsub v1.50.1/go.mod h1:6YVJv3MzWJUVdvQXG081sFvS0dWQOdnV+oTo++q/xFk=
 cloud.google.com/go/pubsub/v2 v2.0.0 h1:0qS6mRJ41gD1lNmM/vdm6bR7DQu6coQcVwD+VPf0Bz0=
 cloud.google.com/go/pubsub/v2 v2.0.0/go.mod h1:0aztFxNzVQIRSZ8vUr79uH2bS3jwLebwK6q1sgEub+E=
+cloud.google.com/go/pubsub/v2 v2.4.0 h1:oMKNiBQpXImRWnHYla9uSU66ZzByZwBSCJOEs/pTKVg=
+cloud.google.com/go/pubsub/v2 v2.4.0/go.mod h1:2lS/XQKq5qtOMs6kHBK+WX1ytUC36kLl2ig3zqsGUx8=
 cloud.google.com/go/storage v1.59.2 h1:gmOAuG1opU8YvycMNpP+DvHfT9BfzzK5Cy+arP+Nocw=
 cloud.google.com/go/storage v1.59.2/go.mod h1:cMWbtM+anpC74gn6qjLh+exqYcfmB9Hqe5z6adx+CLI=
 cloud.google.com/go/trace v1.11.7 h1:kDNDX8JkaAG3R2nq1lIdkb7FCSi1rCmsEtKVsty7p+U=