[bitnami/charts] Disable makdownlint rule MD047 (#15372)

Signed-off-by: Fran Mulero <fmulero@vmware.com>

.markdownlint.json

@@ -2,5 +2,6 @@
    "default": true,
    "MD013": false,
    "MD029": { "style": "ordered" },
-   "MD033": false
+   "MD033": false,
+   "MD047": false
  }