Fix checkout order and use setup-python built-in pip cache

Co-authored-by: MMathisLab <28102185+MMathisLab@users.noreply.github.com>
Agent-Logs-Url: https://github.com/DeepLabCut/DeepLabCut-live-GUI/sessions/21ab9ebe-25bd-4963-b3c9-01ecbf60de45

Author: Copilot

.github/workflows/python-package.yml

@@ -20,21 +20,20 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
       - name: Setup Python
         id: setup-python
         uses: actions/setup-python@v5
         with:
           python-version: '3.x'
-
-      - name: Cache dependencies
-        id: pip-cache
-        uses: actions/cache@v4
-        with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('pyproject.toml', 'requirements.txt', 'setup.cfg', 'setup.py') }}
-          restore-keys: |
-            ${{ runner.os }}-pip-${{ steps.setup-python.outputs.python-version }}-
-            ${{ runner.os }}-pip-
+          cache: 'pip'
+          cache-dependency-path: |
+            pyproject.toml
+            requirements.txt
+            setup.cfg
+            setup.py
 
       - name: Install Qt/OpenGL runtime deps (Ubuntu)
         run: |
@@ -54,9 +53,6 @@ jobs:
           pip install build
           pip install twine
 
-      - name: Checkout code
-        uses: actions/checkout@v4
-
       - name: Build and publish to PyPI
         if: ${{ github.event_name == 'push' }}
         env: