Follow Release Process for `3.0.0-alpha.9`

[da2ce7]

from: release_process.md

This is the fourth attempt. Must Fix:

• check all status checks success for releases/v3.0.0-alpha.8 branch. #446

Comments in the Develop Branch:

• The develop branch has the 3.0.0-alpha.9-develop.
• The version is bumped according to releases, new features, and breaking changes.

Process:

• The develop branch is ready for a release.
• Stage develop HEAD for merging into the main branch.
• Create release commit: release: version 3.0.0-alpha.9, that removes the -develop suffix.
• Create and Merge Pull Request from staging/main into main branch.
• Push new version from main HEAD to releases/v3.0.0-alpha.9 branch.
• Check that the deployment is successful!
• Create Release Tag v3.0.0-alpha.9.
• Create Release on Github from Tag.
• Stage main HEAD for merging into the develop branch.
• Create comment that bumps next development version.
• Create and Merge Pull Request from staging/develop into develop branch.

[da2ce7]

Deployment to crates.io was successful.
However deployment to dockerhub was not successful.