Update Python version markers in configuration files for consistency (#75)

Author: nfelt14

.github/workflows/code-linting.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: x  # any version
+          python-version: 3.8  # PYTHON VERSION MARKER (update all locations that use this marker simultaneously)
           check-latest: true
       - name: Install tox
         run: python -m pip install tox

pyproject.toml

@@ -7,7 +7,7 @@ wrap-summaries = 0
 
 [tool.ruff]
 line-length = 100
-target-version = "py38"  # always generate Python 3.8 compatible code
+target-version = "py38"  # PYTHON VERSION MARKER (update all locations that use this marker simultaneously)
 
 [tool.ruff.lint]
 fixable = ["ALL"]