bump Ubuntu CI image and Python version in Matlab CI job (#416)

Author: slayoo

.github/workflows/readme_listings.yml

@@ -109,7 +109,7 @@ jobs:
     - run : python -c 'import numpy as np; import os; dir="readme_output/"; data=[float(np.loadtxt(dir+file)) for file in os.listdir(dir)]; print("data:", data); similar_as_first = np.array([abs(data[0]-k)/data[0] for k in data[1:]]); print("similar_as_first", similar_as_first); assert((similar_as_first < .5).all())'
 
   matlab:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v2
@@ -118,16 +118,15 @@ jobs:
 
       - uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.9
 
-      - uses: jwlawson/[email protected]
+      - uses: RalfG/[email protected]_x86_64
         with:
-          cmake-version: '3.26.x'
+          python-versions: cp39-cp39
+          build-requirements: 'setuptools_scm'
+          pre-build-command: 'git config --global --add safe.directory "*"'
 
-      - run: |
-          echo "CC=gcc-9" >> $GITHUB_ENV
-          echo "CXX=g++-9" >> $GITHUB_ENV
-          VERBOSE=1 pip install --verbose -e .
+      - run: pip install --verbose dist/*manylinux*.whl
 
       - run: pip install pytest-codeblocks pytest
       - run: python -c "import pytest_codeblocks; code=pytest_codeblocks.extract_from_file('README.md'); f=open('readme.m', 'w'); f.writelines(block.code for block in code if block.syntax=='Matlab'); f.close()"