build(deps): bump rust_team_data from `b9d9c56` to `5210420`

Bumps [rust_team_data](https://github.com/rust-lang/team) from `b9d9c56` to `5210420`.
- [Release notes](https://github.com/rust-lang/team/releases)
- [Commits](https://github.com/rust-lang/team/compare/b9d9c5660a02e7c3a780026764536f2b76bd4bd1...521042014c593a9cb26343e492ddffc4888e7598)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Cargo.lock

@@ -1355,7 +1355,7 @@ dependencies = [
 [[package]]
 name = "rust_team_data"
 version = "1.0.0"
-source = "git+https://github.com/rust-lang/team#b9d9c5660a02e7c3a780026764536f2b76bd4bd1"
+source = "git+https://github.com/rust-lang/team#521042014c593a9cb26343e492ddffc4888e7598"
 dependencies = [
  "indexmap",
  "serde",