add adwinwhite to the compiler team

[davidtwco]

Welcome to the team! 🎉

cc @adwinwhite
cc @wesleywiser

[github-actions]

Dry-run check results

[WARN  sync_team] sync-team is running in dry mode, no changes will be applied.
[INFO  sync_team] synchronizing crates-io
[INFO  sync_team] synchronizing github
[INFO  sync_team] 💻 Team Diffs:
    📝 Editing team 'rust-lang/all':
      Adding member 'adwinwhite' with member role
    📝 Editing team 'rust-lang/compiler':
      Adding member 'adwinwhite' with member role
    📝 Editing team 'rust-lang-nursery/compiler':
      Adding member 'adwinwhite' with member role
    💻 Repo Diffs:
    📝 Editing repo 'rust-lang/bors':
      Rulesets:
          Ruleset for main
            No changes