Set clippy to a fixed version

Author: eldruin

.github/workflows/clippy.yml

@@ -13,6 +13,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: stable
+          toolchain: 1.73.0
           components: clippy
       - run: cargo clippy --all-features -- --deny=warnings