.github/workflows: use stable Go release - it should always point to the latest stable release

This eliminates the need to update .github/workflows/* files whenever new Go stable release is out,
like in the 2db1a664e1 .

See https://github.com/actions/setup-go#using-stableoldstable-aliases

.github/workflows/check-licenses.yml

@@ -17,10 +17,19 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@main
         with:
-          go-version: 1.21.4
+          go-version: stable
+          cache: false
         id: go
       - name: Code checkout
         uses: actions/checkout@master
+      - name: Cache Go artifacts
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+            ~/go/bin
+          key: go-artifacts-${{ runner.os }}-check-licenses-${{ hashFiles('go.sum') }}
+          restore-keys: go-artifacts-${{ runner.os }}-check-licenses-
       - name: Check License
-        run: |
-          make check-licenses
+        run: make check-licenses

.github/workflows/codeql-analysis.yml

@@ -57,7 +57,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.21.4
+          go-version: stable
         if: ${{ matrix.language == 'go' }}
 
       # Initializes the CodeQL tools for scanning.

.github/workflows/main.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.21.4
+          go-version: stable
           cache: false
 
       - name: Cache Go artifacts
@@ -62,7 +62,7 @@ jobs:
         id: go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.21.4
+          go-version: stable
           cache: false
 
       - name: Cache Go artifacts
@@ -92,7 +92,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.21.4
+          go-version: stable
           cache: false
 
       - name: Cache Go artifacts