Fix CI YAML.

.github/workflows/build.yaml

@@ -7,18 +7,22 @@ env:
 
 jobs:
   formatting:
-    name: Check formatting
+    name: Format
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+
       - name: Install stable toolchain
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           components: rustfmt
+
       - name: Rustfmt check
         uses: actions-rust-lang/rustfmt@v1
 
   build:
-    name: Check build
+    name: Build
     needs: formatting
     runs-on: ubuntu-latest
     steps:
@@ -32,7 +36,7 @@ jobs:
         run: cargo check --release
 
   test:
-    name: Check tests
+    name: Test
     needs: build
     runs-on: ubuntu-latest
     steps: