Update Guillaume Gomez email

[GuillaumeGomez]

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[github-actions]

Dry-run check results

[WARN  rust_team::sync] sync-team is running in dry mode, no changes will be applied.
[INFO  rust_team::sync] synchronizing crates-io
[INFO  rust_team::sync] synchronizing github
[INFO  rust_team::sync] 💻 Team Diffs:
    📝 Editing team 'rust-embedded/risc-v':
      Adding member 'jessebraham' with member role
    📝 Editing team 'rust-embedded/triage':
      Adding member 'jessebraham' with member role
    💻 Repo Diffs:
    📝 Editing repo 'rust-lang/mdBook':
      Environments:
        ❌ Delete: copilot