Update boot.rst

[stevewillson]

Modified "cloud-init must be integrated into the boot in fairly controlled way." to "cloud-init must be integrated into the boot in a fairly controlled way." Added an 'a'

[powersj]

Hi!

Thanks for taking the time to submit a merge request. The cloud-init repo here on GitHub is only a mirror of the main repo on Launchpad.

Would you be willing to submit a merge proposal on Launchpad? We have instructions that you can follow.

Thanks again!

[blackboxsw]

Hi @stevewillson. We have updated the cloud-init project to be hosted in github. If you have a chance to sign the Contributor's License Agreement as mentioning in our cloud-init hacking document then we can re-open this Pull request and get your contribution merged.

Much thanks again!