fix go.mod

Author: double-di

go.mod

@@ -1,6 +1,8 @@
 module github.com/gcpug/handy-spanner
 
-go 1.22
+go 1.22.7
+
+toolchain go1.23.4
 
 require (
 	cloud.google.com/go v0.118.2
@@ -28,10 +30,8 @@ require (
 	cloud.google.com/go/monitoring v1.24.0 // indirect
 	github.com/GoogleCloudPlatform/grpc-gcp-go/grpcgcp v1.5.2 // indirect
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.26.0 // indirect
-	github.com/census-instrumentation/opencensus-proto v0.4.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cncf/xds/go v0.0.0-20250121191232-2f005788dc42 // indirect
-	github.com/envoyproxy/go-control-plane v0.13.4 // indirect
 	github.com/envoyproxy/go-control-plane/envoy v1.32.4 // indirect
 	github.com/envoyproxy/protoc-gen-validate v1.2.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect