Support conventional commit based commit messages

[Th3S4mur41]

Currently the action expects a commit message matching the following example:
Bumps netlify-cli from 19.0.0 to 19.0.1

If the repository follows conventional commit parctices though, the commit message created by dependabot would rather look like this:

chore(deps-dev): bump netlify-cli from 19.0.0 to 19.0.1

The commit message regex should be update to reflect this possibility

const bumpFragment = commitMessage.match(/^.*(?:: )?[Bb]ump[s]? .* from (?<from>v?\d[^ ]*) to (?<to>v?\d[^ ]*)\.?$/m)

Note

The Regex above was also updated to reflect the changes in #604

[Th3S4mur41]

Never mind, I got under the impression that the matcher was using the commit title, while it is actually using the commit body