chore: prettify README.md

[aduh95]

It makes sharing portion of the README much more readable:

Before:

email/README.md

Line 20 in 71bb6a0

Since access to the Mailgun API key is required, only members of the @nodejs/build-infra team have the permission to push code to the `main` branch. That was done in order to minimize the possibility of mismatches between the information in this repo, and the actual email routes that are set up.

After:

email/README.md

Lines 21 to 24 in 2fa47a6

	Since access to the Mailgun API key is required, only members of the
	@nodejs/build-infra team have the permission to push code to the `main` branch.
	That was done in order to minimize the possibility of mismatches between the
	information in this repo, and the actual email routes that are set up.

[aduh95]

@nodejs/build-infra can this be merged please?

[targos]

I'm not sure what requirements are missing to merge. I would have to tick "Merge without waiting for requirements to be met (bypass rules)" to do it.

[UlisesGascon]

I'm not sure what requirements are missing to merge. I would have to tick "Merge without waiting for requirements to be met (bypass rules)" to do it.

+1 I'm seeing the same issue in #280 and plan to merge it, as it looks like a straightforward change. It also seems that we're bypassing the rules fairly often (ref).

I believe the original intention was to restrict merging to @nodejs/build-infra members, since changes need to be manually triggered. This also reminds me of the automation proposal in #222, though that would require a deeper discussion around handling production secrets in public GitHub Actions.