fix examples workflow

.github/workflows/check-examples.yml

@@ -42,9 +42,9 @@ jobs:
         python-version: 3.11
     - name: install python requirements for notebooks
       run: |
-        cd examples
         python -m pip install --upgrade pip
         python -m pip install .
+        cd examples
         python -m pip install p2j
     - name: test example notebooks
       run: |