Python 3.9 end-of-life. Agent update. (#33)

Author: snovikov

.github/workflows/docker-build.yml

@@ -16,7 +16,6 @@ jobs:
       fail-fast: false
       matrix:
         PYTHON:
-          - 3.9.24
           - 3.10.19
           - 3.11.14
           - 3.12.12

Makefile

@@ -10,7 +10,7 @@ IMAGE = flaconi/jnlp-slave-py
 TAG = latest
 
 # Base image version: https://github.com/jenkinsci/docker-agent/releases/latest
-JENKINS_AGENT = 3345.v03dee9b_f88fc-1
+JENKINS_AGENT = 3345.v03dee9b_f88fc-5
 
 # Python versions: $PYTHON_MAJOR.$PYTHON_PATCH
 PYTHON_MAJOR = 3.14