Bump go.opentelemetry.io/otel/exporters/stdout/stdouttrace

Bumps [go.opentelemetry.io/otel/exporters/stdout/stdouttrace](https://github.com/open-telemetry/opentelemetry-go) from 1.18.0 to 1.21.0.
- [Release notes](https://github.com/open-telemetry/opentelemetry-go/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-go@v1.18.0...v1.21.0)

---
updated-dependencies:
- dependency-name: go.opentelemetry.io/otel/exporters/stdout/stdouttrace
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -12,11 +12,11 @@ require (
  go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.44.0
  go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.44.0
  go.opentelemetry.io/contrib/propagators/jaeger v1.19.0
- go.opentelemetry.io/otel v1.18.0
+ go.opentelemetry.io/otel v1.21.0
  go.opentelemetry.io/otel/exporters/jaeger v1.17.0
- go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.18.0
- go.opentelemetry.io/otel/sdk v1.18.0
- go.opentelemetry.io/otel/trace v1.18.0
+ go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.21.0
+ go.opentelemetry.io/otel/sdk v1.21.0
+ go.opentelemetry.io/otel/trace v1.21.0
  go.uber.org/zap v1.26.0
  google.golang.org/grpc v1.58.0
  google.golang.org/protobuf v1.31.0
@@ -27,7 +27,7 @@ require (
  github.com/cespare/xxhash/v2 v2.2.0 // indirect
  github.com/davecgh/go-spew v1.1.1 // indirect
  github.com/felixge/httpsnoop v1.0.3 // indirect
- github.com/go-logr/logr v1.2.4 // indirect
+ github.com/go-logr/logr v1.3.0 // indirect
  github.com/go-logr/stdr v1.2.2 // indirect
  github.com/golang/protobuf v1.5.3 // indirect
  github.com/joho/godotenv v1.5.1 // indirect
@@ -37,10 +37,10 @@ require (
  github.com/prometheus/common v0.44.0 // indirect
  github.com/prometheus/procfs v0.10.1 // indirect
  github.com/stretchr/objx v0.5.0 // indirect
- go.opentelemetry.io/otel/metric v1.18.0 // indirect
+ go.opentelemetry.io/otel/metric v1.21.0 // indirect
  go.uber.org/multierr v1.11.0 // indirect
  golang.org/x/net v0.15.0 // indirect
- golang.org/x/sys v0.12.0 // indirect
+ golang.org/x/sys v0.14.0 // indirect
  golang.org/x/text v0.13.0 // indirect
  google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 // indirect
  gopkg.in/yaml.v3 v3.0.1 // indirect