Update busybox Docker tag to v1.38

Author: renovate[bot]

charts/horcrux/values.yaml

@@ -102,7 +102,7 @@ securityContext:
 initContainer:
   image:
     repository: busybox
-    tag: "1.37"
+    tag: "1.38"
     pullPolicy: IfNotPresent
 
 # -- Resource limits and requests