ci: Further split lint steps

.github/workflows/cargo-lint.yml

@@ -15,7 +15,7 @@ env:
   CARGO_TERM_COLOR: always
 
 jobs:
-  lint:
+  clippy:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -40,5 +40,19 @@ jobs:
     - name: clippy
       run: cargo clippy --no-deps ${{ matrix.target }} --verbose -- -Dwarnings
 
-    - name: fmt
-      run: cargo fmt --all --check --verbose
+  fmt:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/cache@v4
+        with:
+          path: target/
+          key: cargo-lint-${{ hashFiles('Cargo.lock') }}
+          restore-keys: |
+            cargo-lint-${{ hashFiles('Cargo.lock') }}
+            cargo-lint-
+            cargo-
+
+      - name: fmt
+        run: cargo fmt --all --check --verbose