ci: remove EOL Python 3.8

Author: fbiville

.github/workflows/python-ci.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.8", "3.9", "3.10", "3.11", "3.12" ]
+        python-version: [ "3.9", "3.10", "3.11", "3.12" ]
         neo4j-version: [ "4.4", "5" ]
         spark-version:
           - { short: "3", ext: "3.4.3", scala: "2.12" }