Add oncall as maintainers for github-sync

[haydentherapper]

Summary

Release Note

Documentation

[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/0123ee7e-8646-4fbb-877c-108b80c33e32

@ Previewing update....
pulumi:pulumi:Stack: (same)
[urn=urn:pulumi:github-prod::sigstore-github-sync::pulumi:pulumi:Stack::sigstore-github-sync-github-prod]
@ Previewing update....
~ github:index/repository:Repository: (update) 🔒
    [id=cosign]
    [urn=urn:pulumi:github-prod::sigstore-github-sync::github:index/repository:Repository::cosign]
    allowAutoMerge          : true
    allowMergeCommit        : false
    allowRebaseMerge        : true
    allowSquashMerge        : true
    archived                : false
    autoInit                : false
    deleteBranchOnMerge     : true
  ~ description             : "Container Signing" => "Code signing and transparency for containers and binaries"
    hasDiscussions          : true
    hasDownloads            : true
    hasIssues               : true
    hasProjects             : true
    hasWiki                 : false
    isTemplate              : false
    mergeCommitMessage      : "PR_TITLE"
    mergeCommitTitle        : "MERGE_MESSAGE"
    name                    : "cosign"
    squashMergeCommitMessage: "COMMIT_MESSAGES"
    squashMergeCommitTitle  : "COMMIT_OR_PR_TITLE"
    visibility              : "public"
    vulnerabilityAlerts     : true
    webCommitSignoffRequired: false
+ github:index/teamRepository:TeamRepository: (create)
    [urn=urn:pulumi:github-prod::sigstore-github-sync::github:index/teamRepository:TeamRepository::github-sync-sigstore-oncall]
    permission: "maintain"
    repository: "github-sync"
    teamId    : "6693572"
~ github:index/repository:Repository: (update) 🔒
    [id=public-good-instance]
    [urn=urn:pulumi:github-prod::sigstore-github-sync::github:index/repository:Repository::public-good-instance]
  ~ deleteBranchOnMerge: false => true
@ Previewing update....
Resources:
+ 1 to create
~ 2 to update
3 changes. 572 unchanged