Ci/fix release

[pmpetit]

This pull request updates the release workflow to better support manual releases and adds support for a new tag pattern. It also bumps the mongo2pg package version to 0.6.1. The most important changes are:

Release workflow improvements:

• Added support for manual workflow dispatch (workflow_dispatch) with a required tag input, allowing maintainers to trigger releases for existing tags.
• Updated the tag matching pattern to include tags starting with mongo2pg-v, enabling releases for those tags as well as the original v*.*.* pattern.
• Modified the actions/checkout step to check out the correct ref when the workflow is manually triggered, ensuring assets are built from the intended tag.
• Updated the release creation step to use the correct tag name when triggered manually.

Version bump:

• Bumped the mongo2pg package version from 0.6.0 to 0.6.1 in Cargo.toml.