Update Python version in GitHub Actions workflow

Author: LCrossman

.github/workflows/python-app.yml

@@ -1,4 +1,4 @@
-# This workflow will install Python dependencies, run tests and lint with a single version of Python
+# This workflow installs Python dependencies, runs tests and lints with a single version of Python
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
 
 name: microbiorust-py python tests
@@ -23,11 +23,12 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Python 3.10
-      uses: actions/setup-python@v3
+    - name: Set up Python 3.12
+      uses: actions/setup-python@v5
       with:
-        python-version: "3.10"
+        python-version: "3.12"
         cache: 'pip'
+        cache-dependency-path: 'microbiorust-py/pyproject.toml'
 
     - name: Set up Rust
       uses: dtolnay/rust-toolchain@stable