Make Kafka DefaultMode YAML 1.2 Compliant (#21086)

With the YAML 1.2 spec octals must be prefixed with `0o` and not `0`.
Parsers implementing the latest spec run into issues. See discussion
here: dtolnay/serde-yaml#225

This commit makes the Kafka script mounts compliant with YAML 1.2.

Signed-off-by: Marc Schreiber <info@schrieveslaach.de>

bitnami/kafka/templates/broker/statefulset.yaml

@@ -374,7 +374,7 @@ spec:
         - name: scripts
           configMap:
             name: {{ include "common.names.fullname" . }}-scripts
-            defaultMode: 0755
+            defaultMode: 493
         {{- if and .Values.externalAccess.enabled .Values.externalAccess.autoDiscovery.enabled }}
         - name: kafka-autodiscovery-shared
           emptyDir: {}