workflows: Bump python version on Windows to try to fix lldb failure

Reviewed By: thieta

Differential Revision: https://reviews.llvm.org/D142719

(cherry picked from commit 9f307a0)

Author: tstellar

.github/workflows/llvm-project-tests.yml

@@ -53,7 +53,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.10'
+          python-version: '3.11'
       - name: Install Ninja
         uses: llvm/actions/install-ninja@main
       # actions/checkout deletes any existing files in the new git directory,