Exclude python 3.8 and 3.9 from the test matrix

In conda environments new incompatibility issues appear

Author: Thierry RAMORASOAVINA

.github/workflows/tests.yml

@@ -37,7 +37,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
     container:
       # 'latest' default image tag cannot be set as an environment variable,
       # because the `env` context is only accessible at the step level;