🚧 Set Go cache to false, introduce custom cache

The path is set to the newly introduced GOPATH that is set as an environment variable, and the key for the cache is set to `setup.py`, `pyproject.toml` – this can be further refined by setting a different file for the Hugo SHA-256 hash and the version of Hugo being installed.

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.8", "3.12"]
-        go-version: ["1.20.12", "1.21.5"]
+        go-version: ["1.20.x", "1.21.x"]
         runs-on: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
@@ -39,6 +39,8 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go-version }}
+          cache: false
+          check-latest: true
 
       - name: Install GCC on Linux
         if: matrix.runs-on == 'ubuntu-latest'
@@ -48,6 +50,12 @@ jobs:
         if: matrix.runs-on == 'windows-latest'
         run: choco install mingw
 
+      - name: Restore Hugo builder cache
+        uses: actions/cache@v3.3.2
+        with:
+          path: ./hugo_cache/
+          key: ${{ runner.os }}-${{ matrix.go-version }}-hugo-build-cache-${{ hashFiles('**/setup.py', '**/pyproject.toml') }}
+
       - name: Install Python dependencies
         run: python -m pip install build virtualenv nox