Docs:

* Add release notes for 4.8.2 to docs (#9632)
* Fix typos in docs (#9637, #9643)
* Grammatical and formatting changes (#9647)

Bug fixes:

* Account for channel is specs (#9748)

Contributors:

* @bernardoduarte
* @forrestwaters
* @jjhelmus
* @msarahan
* @rrigdon
* @timgates42