[ci] Added python 3.12 to pytest and examples workflows. (#212)

Author: fjosw

.github/workflows/examples.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.8", "3.10"]
+        python-version: ["3.8", "3.10", "3.12"]
 
     steps:
       - name: Checkout source

.github/workflows/pytest.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         include:
           - os: macos-latest
             python-version: "3.10"