Update docker.io/bitnami/kubectl Docker tag to v1.31.4 (#65)

Co-authored-by: projectorigin-renovate[bot] <150237208+projectorigin-renovate[bot]@users.noreply.github.com>

Author: projectorigin-renovate[bot]

chart/values.yaml

@@ -154,4 +154,4 @@ migrationWaiter:
     # repository is the repository to pull the image from
     repository: bitnami/kubectl
     # tag is the tag to pull defaults to the chart version
-    tag: 1.31.3
+    tag: 1.31.4