* Prepare release 2.1.0.0
* Update release ghc versions
* Fix release CI for unknown linux
* Generate ChangeLog from 2.0.0.0
* Update notable changes in ChangeLog
* Update index-state
* Add environment for vars context
* Free up disk space after running test
* Expand release notes
* Update supported ghc version page
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Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>