gbm CLI checklist includes clear directions

[dcalhoun]

Currently, when generating a release checklist with the gbm CLI, there are a few typos, missing syntax parsing, or unnecessary conditional statements. We could address these to improve clarity.

### Tasks
- [x] Update notice channel for infrastructure team (i.e. reapply #141)
- [ ] https://github.com/wordpress-mobile/release-toolkit-gutenberg-mobile/issues/147
- [x] Ensure Markdown code syntax is parsed. Replace usage of a separate Quote block with task text separated from task description by two new lines.
- [x] Given the template now adapts to the typeof release, we can remove the conditional prefix for tasks.
- [x] Repair the GitHub Release link to include the required .0 in the release, tag, and branch names.
- [x] Copy changes from https://github.com/wordpress-mobile/release-toolkit-gutenberg-mobile/pull/143

Screenshot	Action
	Fix interpolation to display correct version number without extraneous characters.
	Ensure Markdown code syntax is parsed. Replace usage of a separate Quote block with task text separated from task description by two new lines.
	Given the template now adapts to the typeof release, we can remove the conditional prefix for tasks.
	Repair the GitHub Release link to include the required .0 in the release, tag, and branch names.

[jhnstn]

I believe most of the issues here were related to this

I've expanded the version verification to ensure there is always a patch value, even for .0. This seemed like the most efficient way to avoid surprises. I also don't think it's too much effort to type out the full release version.

The other issues were resolved in https://github.com/wordpress-mobile/release-toolkit-gutenberg-mobile/pull/146