Update cr.fluentbit.io/fluent/fluent-bit Docker tag to v4.2.4

Author: govuk-ci

charts/kubernetes-events-shipper/values.yaml

@@ -1,4 +1,4 @@
 image:
   repository: cr.fluentbit.io/fluent/fluent-bit
-  tag: "4.1.1"
+  tag: "4.2.4"
   pullPolicy: IfNotPresent