Update build_pages action to use uv

Author: RogerSelwyn

.github/workflows/build_pages.yml

@@ -14,14 +14,18 @@ jobs:
       - name: "Set up Python"
         uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
-          cache: "pip"
+          python-version-file: "pyproject.toml"
 
-      - name: "Install requirements"
-        run: python3 -m pip install -r requirements-pages.txt
+      - name: Install uv
+        uses: astral-sh/setup-uv@v1
+        with:
+          version: "latest"
+
+      - name: Install dependencies
+        run: uv sync 
 
       - name: "Build pages"
-        run: sphinx-build -b html -c ./docs/source/ ./docs/source/ ./docs/latest/ 
+        run: uv run sphinx-build -b html -c ./docs/source/ ./docs/source/ ./docs/latest/ 
 
       - name: "Pull any updates"
         shell: bash