workflow: take go version from mod file

Author: NotLe0n

.github/workflows/hugo.yaml

@@ -36,6 +36,8 @@ jobs:
     steps:
       - name: Setup Go environment
         uses: actions/setup-go@v5
+        with:
+          go-version-file: './go.mod'
 
       - name: Install Hugo CLI
         run: |