Update quay.io/kroxylicious/python-kafka-test-client Docker tag to v2.12.1

Signed-off-by:

Author: renovate-bot

kroxylicious-systemtests/src/main/java/io/kroxylicious/systemtests/Constants.java

@@ -117,7 +117,7 @@ private Constants() {
      * Test clients image url
      */
     public static final String KCAT_CLIENT_IMAGE = "quay.io/kroxylicious/kcat:1.7.1";
-    public static final String PYTHON_CLIENT_IMAGE = "quay.io/kroxylicious/python-kafka-test-client:0.1.1-2.11.1";
+    public static final String PYTHON_CLIENT_IMAGE = "quay.io/kroxylicious/python-kafka-test-client:0.1.1-2.12.1";
     public static final String KAF_CLIENT_IMAGE = "quay.io/kroxylicious/kaf:v0.2.13";
 
     /**