Test samples without python 3.8 and with 3.13

Author: 4c0n

.github/workflows/samples-python-client-echo-api.yaml

@@ -18,11 +18,11 @@ jobs:
           - samples/client/echo_api/python
           - samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent
         python-version:
-          - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5

.github/workflows/samples-python-petstore.yaml

@@ -15,11 +15,11 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
         sample:
           - samples/openapi3/client/petstore/python-aiohttp
           - samples/openapi3/client/petstore/python