Bump version to v0.9.1 and spec_version to v9010 (#3001)

* bump version and spec_version

* fix generate_release_text.rb

* Revert "fix generate_release_text.rb"

This reverts commit 9e01e0ae4f6db2155d123f69063db7d7564588e0.

* fix publish_draft_release

* fix publish_draft_release

* update target cache