Review and update documentation (August Milestone)

[jsquire]

Summary

In preparation for the next milestone release of the Event Hubs client, the documentation which accompanies it should be reviewed for accuracy and any updates which are needed made.

Scope of Work

• The document comments for the API surface exist and are accurate. Any needed updates to reflect the new retry options approach have been made.

• The README content is up to date, accurate, and complete.

• The CHANGELOG has been filled in for the release and contains the appropriate level of detail.

• Update the release notes in the main Azure SDK library with the major call-outs from the Event Hubs change log.

Out of Scope

• Updates or changes to samples; that will be covered under a dedicated workstream.

Success Criteria

• The documentation detailed by the scope has been reviewed, updated, and is in a good state for release of the Event Hubs client library.

• The package installation instructions points to the correct NuGet package.