ci(buildrelease): use Python 3.12 for building docs (#27)

Author: cesarcoatl

.github/workflows/buildrelease.yml

@@ -81,7 +81,7 @@ jobs:
 
       - uses: actions/setup-python@v6
         with:
-          python-version: '3.x'
+          python-version: '3.12'
 
       - name: Install dependencies
         run: |