Bump gem-release, and publish 0.0.45

Asherah Connorrequested to merge
kiv/bump-gem-release into main

What does this MR do and why?

build-gem-env is failing! https://gitlab.com/gitlab-org/ruby/gems/gitlab-glfm-markdown/-/jobs/16985645453

Bump our gem-release pin, and bump the version to 0.0.45 so we get a release.

Edited by Asherah Connor

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