Content 0.48.x content dropped from 0.49.1 release

[cdaringe]

What happened?

Steps to Reproduce

1. observe release notes for 0.48.0.
2. Specifically, observe fix(exporter-*-otlp-grpc)!: lazy load gRPC #4432 was present in that release.
3. As a reference, you can see in main/experimental/packages/otlp-grpc-exporter-base/src/OTLPGRPCExporterNodeBase.ts that there is no more usage of setImmediate. Edit: that's a link to main, but the same is true for the 0.49.1 as well.
4. Install @opentelemetry/[email protected]
5. Observe that the referenced setImmediate has crept back in.

Expected Result

0.49.1 should have latest experimental stuff in it, such as #4432

Actual Result

Key changes from #4432 missing

Additional Details

OpenTelemetry Setup Code

n/a

package.json

n/a

Relevant log output

n/a

[pichlermarc]

The entry ended up on the wrong version when merging, and was put back onto the Unreleased section via #4559
It will be part of an upcoming release (0.50.0)

Edit: see actual changelog for 0.49.1

[pichlermarc]

0.50.0 is out now and should include these changes.