Update publish-to-test-pypi.yml to Ubuntu 24.04

Author: leondgarse

.github/workflows/publish-to-test-pypi.yml

@@ -5,7 +5,7 @@ on: push
 jobs:
   build-n-publish:
     name: build and publish python 🐍 distributions 📦 to pypi and testpypi
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
     - uses: actions/checkout@master
     - name: Set up Python 3.9