Upgrade clippy job to Rust 1.67.1

Author: webmaster128

.circleci/config.yml

@@ -72,7 +72,7 @@ workflows:
           matrix:
             parameters:
               # Run with MSRV and some modern stable Rust
-              rust-version: ["1.60.0", "1.66.0"]
+              rust-version: ["1.60.0", "1.67.1"]
       - benchmarking:
           requires:
             - package_vm