ci: use python 3.11

Change-Id: Ie8d37bf5f5ed8b54cca3ba512aef38ed3a9e94c1
diff --git a/.github/workflows/linkcheck.yml b/.github/workflows/linkcheck.yml
index 71cb868..45c0e20 100644
--- a/.github/workflows/linkcheck.yml
+++ b/.github/workflows/linkcheck.yml
@@ -18,10 +18,10 @@
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.10'
+          python-version: '3.11'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -r requirements.txt
+          python -m pip install -r requirements.txt
       - name: Check external links
         run: make linkcheck