Run Clippy on stable rustc; tweak workflow

.github/workflows/workspace.yml

@@ -4,30 +4,21 @@ on:
   pull_request:
     paths-ignore:
       - README.md
-      - "benches/**"
   push:
     branches: master
     paths-ignore:
       - README.md
-      - "benches/**"
 
 jobs:
   clippy:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: 1.78.0
-          components: clippy
-      - run: cargo clippy --all --all-targets -- -D warnings
-
-  rustfmt:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: stable
-          components: rustfmt
-      - run: cargo fmt --all -- --check
+          components: clippy, rustfmt
+      - name: Clippy
+        run: cargo clippy --all --all-targets -- -D warnings
+      - name: Rustfmt
+        run: cargo fmt --all -- --check