Move Go setup after checkout in CI jobs

.github/workflows/continuous-integration.yaml

@@ -15,27 +15,28 @@ jobs:
     name: Unit tests
     runs-on: ubuntu-22.04
     steps:
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v4
+
     - name: Set up Go
       uses: actions/setup-go@v5
       with:
         go-version: "~1.21.1"
 
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v4
-
     - name: "basic checks"
       run: make ci
 
   lint:
     name: Code standards (linting)
     runs-on: ubuntu-22.04
     steps:
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v4
+
     - name: Set up Go
       uses: actions/setup-go@v5
       with:
         go-version: "~1.21.1"
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v4
 
     - uses: actions/cache@v3
       with: