Add cache

Author: lfarv

.github/workflows/docs.yml

@@ -23,6 +23,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: 3.9
+        cache: pip
 
     - name: Build and install at
       run: python -m pip install ".[plot, doc]"

.github/workflows/matlab-tests.yml

@@ -30,6 +30,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: '3.9'
+        cache: pip
 
     - name: Set up MATLAB
       uses: matlab-actions/setup-matlab@v1

.github/workflows/python-tests.yml

@@ -30,6 +30,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
+        cache: pip
 
     - name: Build and install at with tests
       run: python -m pip install -e ".[dev]"