Bump proc-macro2 from 1.0.66 to 1.0.67 (#1164)

Bumps [proc-macro2](https://github.com/dtolnay/proc-macro2) from 1.0.66 to 1.0.67.
- [Release notes](https://github.com/dtolnay/proc-macro2/releases)
- [Commits](dtolnay/proc-macro2@1.0.66...1.0.67)

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

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

Cargo.toml

@@ -60,7 +60,7 @@ jsonrpsee = { version = "0.20" }
 pretty_assertions = "1.4.0"
 primitive-types = { version = "0.12.1", default-features = false, features = ["codec", "scale-info", "serde"] }
 proc-macro-error = "1.0.4"
-proc-macro2 = "1.0.66"
+proc-macro2 = "1.0.67"
 quote = "1.0.33"
 regex = "1.9.5"
 scale-info = "2.9.0"