chore: release v0.20.0-alpha.2

[github-actions]

🤖 New release

• octocrab: 0.20.0-alpha.1 -> 0.20.0-alpha.2 (✓ API compatible changes)

Changelog

0.20.0-alpha.2 - 2023-04-10

Other

• Extend GistsHandler through star(...), unstar(...), is_starred(...) (gists+examples: Extend GistsHandler through star(...), unstar(...), is_starred(...) #330)
• added poll org events (Added poll org events #325)
• Add CurrentAuthHandler::list_gists_for_authenticated_user (current: Add CurrentAuthHandler::list_gists_for_authenticated_user #328)
• Fix typo in POST /gists endpoint (gists: Fix typo in POST /gists endpoint #327)
• Update hyper-rustls requirement from 0.23.2 to 0.24.0 (Update hyper-rustls requirement from 0.23.2 to 0.24.0 #324)
• Percent encode label name in remove_label to avoid InvalidUri(InvalidUriChar) error (Percent encode label name in remove_label to avoid InvalidUriChar error #323)
• Update CHANGELOG.md
• Update CHANGELOG.md

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