Update installation

Author: johnsamuelwrites

.github/workflows/example-executability.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Install baseline package
         run: |
           python -m pip install --upgrade pip
-          BASELINE_VERSION=$(python -c "import pathlib, re; text = pathlib.Path('README.md').read_text(encoding='utf-8'); print(re.search(r'This repo is aligned with `multilingualprogramming` `([^`]+)`\\.', text).group(1))")
+          BASELINE_VERSION=$(python -c 'import pathlib, re; text = pathlib.Path("README.md").read_text(encoding="utf-8"); print(re.search(r"This repo is aligned with `multilingualprogramming` `([^`]+)`\.", text).group(1))')
           python -m pip install "multilingualprogramming==${BASELINE_VERSION}"
 
       - name: Execute all example programs