build(deps): bump proc-macro2 from 1.0.64 to 1.0.66 (#4766)

Bumps [proc-macro2](https://github.com/dtolnay/proc-macro2) from 1.0.64 to 1.0.66.
- [Release notes](https://github.com/dtolnay/proc-macro2/releases)
- [Commits](dtolnay/proc-macro2@1.0.64...1.0.66)

---
updated-dependencies:
- dependency-name: proc-macro2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -9,5 +9,5 @@ proc-macro = true
 [dependencies]
 syn = { version = "1.0.98", features = ["full"] }
 quote = "1.0"
-proc-macro2 = "1.0.64"
+proc-macro2 = "1.0.66"
 heck = "0.4"