ci: pin Python version in CI - test suite and static-analysis.

* No wheels for PyTorch for 3.14
* Issues installing pygit for cpp-linter

Author: jatkinson1000

.github/workflows/static_analysis.yml

@@ -56,7 +56,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.x'
+          python-version: '3.13'  # Use 3.13 as no PyTorch wheels for 3.14 yet.
 
       - name: Install Dependencies
         run: |

.github/workflows/test_suite_ubuntu.yml

@@ -111,7 +111,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.x'
+          python-version: '3.13'  # Use 3.13 as no PyTorch wheels for 3.14 yet.
 
       - name: Install PyTorch
         run: |
@@ -205,7 +205,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.x'
+          python-version: '3.13'  # Use 3.13 as no PyTorch wheels for 3.14 yet.
 
       - name: Install PyTorch
         run: |