Add @isaacs as a contributor

[timfish]

I'm not always available so it would be great if someone else could approve PRs from Sentry's perspective.

@isaacs has been working with orchestrion a lot.

@nodejs/orchestrion-js-maintainers

[jsumners-nr]

👍

[timfish]

@legendecas are you able to add @isaacs ?

[legendecas]

I see 3 +1 reactions and a +1 comment, no objections in 3 weeks.

Invited @isaacs, welcome onboard!