Switch CI back to stable clippy

Author: nipunn1313

.github/workflows/ci.yml

@@ -90,9 +90,8 @@ jobs:
       - name: Install Rust
         run: |
           rustup set profile minimal
-          # Pin to older version until a clippy regression is fixed
-          rustup update 1.53.0
-          rustup default 1.53.0
+          rustup update stable
+          rustup default stable
 
       - id: rustc
         run: