OpenTelemetry README - incorrect comment syntax?

### Bug Title

The OpenTelemetry crate code appears with `#` at the beginning of some lines

### Crate Name

azure_core_opentelemetry

### Crate Version

*

### Description

The `#` doesn't look correct for the language. Can someone verify it is supposed to be there? @ronniegeraghty

### Steps to Reproduce

1. Go to https://crates.io/crates/azure_core_opentelemetry
2. View code block

### Checklist

- [x] Follow our [Code of Conduct](https://github.com/Azure/azure-sdk-for-rust/blob/main/CODE_OF_CONDUCT.md)
- [x] Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
- [x] The provided reproduction is a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) of the bug.