ci: Split format and clippy

Avoids warnings about unstable rustfmt options by using nightly for format.

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

Author: jschwe

.github/workflows/ci.yml

@@ -7,14 +7,21 @@ on:
   pull_request:
 
 jobs:
-  code_quality:
-    name: Code Quality
+  format:
+    name: Format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: actions/checkout@v6
+      - uses: dtolnay/rust-toolchain@nightly
       - run: cargo fmt --check
-      - run: cargo clippy
+
+  clippy:
+  name: Clippy
+  runs-on: ubuntu-latest
+  steps:
+    - uses: actions/checkout@v6
+    - uses: dtolnay/rust-toolchain@stable
+    - run: cargo clippy
 
   integrity:
     name: Integrity Test
@@ -248,7 +255,8 @@ jobs:
     if: always()
     # needs all build to detect cancellation
     needs:
-      - code_quality
+      - format
+      - clippy
       - build-toolchains
       - api_feature_levels
       - api_minimal_features