update python-version in release.yml to 3.11

Author: drbenvincent

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Build the sdist and the wheel
         run: |
           pip install build
@@ -62,7 +62,7 @@ jobs:
           repository_url: https://test.pypi.org/legacy/
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Test pip install from test.pypi
         run: |
           # Give time to test.pypi to update its index. If we don't wait,

CONTRIBUTING.md

@@ -47,7 +47,7 @@ For more instructions see the [Pull request checklist](#pull-request-checklist)
 
    Always use a feature branch. It's good practice to never routinely work on the `main` branch of any repository.
 
-1. Create a new environment using Python >=3.8, for example 3.11
+1. Create a new environment using Python >=3.10, for example 3.11
 
     ```bash
     conda create --name CausalPy python=3.11