Bump go.opentelemetry.io/collector/model in /exporter/newrelicexporter

Bumps [go.opentelemetry.io/collector/model](https://github.com/open-telemetry/opentelemetry-collector) from 0.47.0 to 0.50.0.
- [Release notes](https://github.com/open-telemetry/opentelemetry-collector/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-collector/blob/main/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-collector@v0.47.0...v0.50.0)

---
updated-dependencies:
- dependency-name: go.opentelemetry.io/collector/model
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

exporter/newrelicexporter/go.mod

@@ -7,15 +7,15 @@ require (
 	github.com/golang/protobuf v1.5.2
 	github.com/newrelic/newrelic-telemetry-sdk-go v0.8.1
 	github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/opencensus v0.47.0
-	github.com/stretchr/testify v1.7.0
+	github.com/stretchr/testify v1.7.1
 	go.opencensus.io v0.23.0
 	go.opentelemetry.io/collector v0.47.0
-	go.opentelemetry.io/collector/model v0.47.0
+	go.opentelemetry.io/collector/model v0.50.0
 	go.uber.org/multierr v1.8.0
 	go.uber.org/zap v1.21.0
 	google.golang.org/genproto v0.0.0-20211208223120-3a66f561d7aa
-	google.golang.org/grpc v1.45.0
-	google.golang.org/protobuf v1.27.1
+	google.golang.org/grpc v1.46.0
+	google.golang.org/protobuf v1.28.0
 )
 
 require (
@@ -32,6 +32,7 @@ require (
 	github.com/open-telemetry/opentelemetry-collector-contrib/internal/coreinternal v0.47.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/spf13/cast v1.4.1 // indirect
+	go.opentelemetry.io/collector/pdata v0.50.0 // indirect
 	go.opentelemetry.io/otel v1.4.1 // indirect
 	go.opentelemetry.io/otel/metric v0.27.0 // indirect
 	go.opentelemetry.io/otel/trace v1.4.1 // indirect