Bump clippy version to 1.75.0 (#1427)

Author: tarcieri

.github/workflows/workspace.yml

@@ -26,7 +26,7 @@ jobs:
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.73.0
+          toolchain: 1.75.0
           components: clippy
       - run: cargo clippy --all --all-features --tests -- -D warnings