Set compiler team as co-owners of annotate-snippets

[Kobzol]

Per the discussion in #2742 (comment).

CC @Muscraft

[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] 💻 Trusted Publishing Crate Diffs:
      Adding `team` owner `github:rust-lang:compiler` to krate `annotate-snippets`
[INFO  rust_team::sync] synchronizing github

[INFO  rust_team::sync] 💻 Repo Diffs:

📝 Editing repo 'rust-lang/annotate-snippets-rs':

Permission Changes:

Giving team 'compiler' write permission