Update configure-pdb.md

sync with English version

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Co-authored-by: Qiming Teng <tengqim@cn.ibm.com>

content/zh/docs/tasks/run-application/configure-pdb.md

@@ -80,6 +80,13 @@ selector goes into the PDBs `.spec.selector`.
 在这种情况下，在控制器的 `.spec.selector` 字段中做记录，并在 PDB 的
 `.spec.selector` 字段中加入同样的选择算符。
 
+<!--
+From version 1.15 PDBs support custom controllers where the [scale subresource](/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definitions/#scale-subresource) is enabled.
+-->
+从 1.15 版本开始，PDB 支持启用
+[scale 子资源](/zh/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definitions/#scale-subresource)
+的自定义控制器。
+
 <!--
 You can also use PDBs with pods which are not controlled by one of the above
 controllers, or arbitrary groups of pods, but there are some restrictions,
@@ -421,4 +428,3 @@ to create PDBs whose selectors overlap.
 你可以令选择算符选择一个内置控制器所控制 Pod 的子集或父集。
 然而，当名字空间下存在多个 PDB 时，用户必须小心，保证 PDB 的选择算符之间不重叠。
 
-