Update python-test.yml to run tests on 3.13

Author: smt5541

.github/workflows/python-test.yml

@@ -5,7 +5,7 @@ name: Flask-Parameter-Validation Unit Tests
 
 on:
   push:
-    branches: [ "master" ]
+    branches: [ "master", "dev/steichman/python3.13"]
   pull_request:
     branches: [ "master" ]
 
@@ -19,7 +19,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v4