ci: fix build workflow - building docs should use nightly

Signed-off-by: Lachezar Lechev <elpiel93@gmail.com>

.github/workflows/build.yml

@@ -9,34 +9,40 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build:
-    name: Lint, test and build
+  lint-and-docs:
+    name: Lint and check docs
     runs-on: ubuntu-latest
 
     steps:
 
     - name: Checkout
       uses: actions/checkout@v4
 
-    - name: Rust setup (stable)
-      uses: dtolnay/rust-toolchain@stable
-
-    - uses: Swatinem/rust-cache@v2
+    - name: Rust setup (nightly) for docs
+      uses: dtolnay/rust-toolchain@nightly
+
 
     - name: Lint - rustfmt
       run: cargo fmt --all -- --check
 
     - name: Lint - clippy
       run: cargo clippy --all --no-deps -- -D warnings
 
-    - name: Build
-      run: cargo check
-
-    - name: Test
-      run: cargo test
-
     - name: Docs
       env:
         RUSTDOCFLAGS: -D warnings --cfg docsrs
       run: cargo doc --no-deps --all-features
 
+  check-and-test:
+        name: Lint and check docs
+        runs-on: ubuntu-latest
+
+        steps:
+
+        - name: Rust setup (stable)
+          uses: dtolnay/rust-toolchain@stable
+
+        - uses: Swatinem/rust-cache@v2
+
+        - run: cargo check --all-features
+        - run: cargo test --all-features