Bump golang.org/x/net from 0.15.0 to 0.18.0

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.15.0 to 0.18.0.
- [Commits](golang/net@v0.15.0...v0.18.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -19,7 +19,7 @@ require (
 	go.opentelemetry.io/otel/exporters/prometheus v0.39.0
 	go.opentelemetry.io/otel/metric v1.21.0
 	go.opentelemetry.io/otel/sdk/metric v0.39.0
-	golang.org/x/net v0.15.0
+	golang.org/x/net v0.18.0
 	google.golang.org/grpc v1.55.0
 	google.golang.org/protobuf v1.31.0
 )
@@ -94,11 +94,11 @@ require (
 	go.uber.org/atomic v1.9.0 // indirect
 	go.uber.org/multierr v1.8.0 // indirect
 	go.uber.org/zap v1.21.0 // indirect
-	golang.org/x/crypto v0.13.0 // indirect
+	golang.org/x/crypto v0.15.0 // indirect
 	golang.org/x/oauth2 v0.6.0 // indirect
-	golang.org/x/sys v0.12.0 // indirect
-	golang.org/x/term v0.12.0 // indirect
-	golang.org/x/text v0.13.0 // indirect
+	golang.org/x/sys v0.14.0 // indirect
+	golang.org/x/term v0.14.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
 	golang.org/x/time v0.0.0-20220411224347-583f2d630306 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 // indirect