updating github action, using encukou's version

Author: ZelenyMartin

.github/workflows/main.yml

@@ -11,21 +11,21 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: 3.13
     - name: Poetry cache
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: ~/.cache/pypoetry
         key: poetry-cache-${{ runner.os }}-${{ hashFiles('poetry.lock') }}-${{ hashFiles('.github/workflows/*.yml') }}
     - name: Pip cache
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: ~/.cache/pip
         key: pip-cache-${{ runner.os }}-${{ hashFiles('.github/workflows/*.yml') }}
     - name: Install dependencies
       run: |
         python -m pip install poetry
-        poetry install -E ghp-compiled
+        poetry install -E ghp-compiled --no-root
     - name: Compile the courses
       run: |
           poetry run python -m naucse_render compile _compiled \