Update gh-pages deploy task to use poetry

Signed-off-by: Rahul Krishna <i.m.ralk@gmail.com>

Author: rahlk

.github/workflows/mkdocs-deploy.yml

@@ -19,6 +19,8 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.11"
+      - name: Install Poetry
+        run: pip install poetry
       - name: Install Dependencies
         run: poetry install --no-root 
       - name: Deploy docs