bump hayden to admin privs

[bobcallaway]

per discussion in slack, elevating community chair to have admin privileges in org

@trevrosen @priyawadhwa @lukehinds @SantiagoTorres fyi

[github-actions]

🍹 preview on sigstore-github-sync/sigstore/github-prod

Pulumi report

Previewing update (sigstore/github-prod)

View Live: https://app.pulumi.com/sigstore/sigstore-github-sync/github-prod/previews/3c62a515-6914-4768-8dc8-1bdbab8de796

@ Previewing update....
pulumi:pulumi:Stack: (same)
[urn=urn:pulumi:github-prod::sigstore-github-sync::pulumi:pulumi:Stack::sigstore-github-sync-github-prod]
~ github:index/membership:Membership: (update) 🔒
    [id=sigstore:haydentherapper]
    [urn=urn:pulumi:github-prod::sigstore-github-sync::github:index/membership:Membership::haydentherapper]
    [provider=urn:pulumi:github-prod::sigstore-github-sync::pulumi:providers:github::default_6_2_1::c4864a06-f2c2-4a7a-b9b8-d9a955761310]
  ~ role: "member" => "admin"
@ Previewing update....
Resources:
~ 1 to update
586 unchanged