Update dependency python to 3.13

Author: renovate[bot]

.github/workflows/build.yml

@@ -165,7 +165,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.13
 
       - name: Prepare docs
         run: .buildscript/prepare_mkdocs.sh