chore(deps): update container image bitnami/wordpress to v6.4.2@557e6d3 (#15854)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| bitnami/wordpress | patch | `6.4.1` -> `6.4.2` |

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charts/stable/wordpress/Chart.yaml

@@ -1,8 +1,8 @@
 kubeVersion: '>=1.24.0'
 apiVersion: v2
 name: wordpress
-version: 3.1.0
-appVersion: 6.4.1
+version: 3.1.1
+appVersion: 6.4.2
 description: The WordPress rich content management system can utilize plugins, widgets,
   and themes.
 home: https://truecharts.org/charts/stable/wordpress

charts/stable/wordpress/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: bitnami/wordpress
   pullPolicy: IfNotPresent
-  tag: 6.4.1@sha256:df86abd1d2c1123bcbac02f691593cbbb9c266b8c6d9211114fb762fdcdda3a4
+  tag: 6.4.2@sha256:557e6d367ca0a5ecfb511a4eaf2ff5eea2d6e0c7d4c0bf9383d83595196f093d
 securityContext:
   container:
     readOnlyRootFilesystem: false