tpa-rfc-2: decapitalize "Star" for consistency

### Triage

One member of TPA is assigned the "Star of the weeks" every other

week. The Star is responsible for triage, which occurs in GitLab, as

One member of TPA is assigned the "star of the week" every other

week. The star is responsible for triage, which occurs in GitLab, as

per the [TPA-RFC-5: GitLab migration](policy/tpa-rfc-5-gitlab) policy.

But the Star also handles routine tasks and interruptions. In that

But the star also handles routine tasks and interruptions. In that

sense, it acts as a "[interruption shield](https://queue.acm.org/detail.cfm?id=1922541)" by taking care of

small, distracting tasks to let others focus on more long-term

projects.

In that sense, the Star takes care of the above [routine tasks](#routine)

In that sense, the star takes care of the above [routine tasks](#routine)

like server reboots, security upgrades and spam runs. It is also

expected to keep an eye on the monitoring system and organise

[incident response](howto/incident-response) when a more serious issue occurs. It is *NOT*

responsible for fixing *all* the issues and it is expected the Star

responsible for fixing *all* the issues and it is expected the star

will assign work or ask for help in an emergency or if it is

overwhelmed.