Bump google.golang.org/grpc in /extension/bearertokenauthextension

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.45.0 to 1.46.2.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.45.0...v1.46.2)

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

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

Author: dependabot[bot]

extension/bearertokenauthextension/go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/stretchr/testify v1.7.0
 	go.opentelemetry.io/collector v0.47.0
 	go.uber.org/zap v1.21.0
-	google.golang.org/grpc v1.45.0
+	google.golang.org/grpc v1.47.0
 )
 
 require (