update MD by dispatch event pingcap/docs release-8.5

Author: github-actions

markdown-pages/en/tidb/release-8.5/pd-configuration-file.md

@@ -77,7 +77,7 @@ This document only describes parameters that are not included in command-line pa
 ### `lease`
 
 + The timeout of the PD Leader Key lease. After the timeout, the system re-elects a Leader.
-+ Default value: `3`
++ Default value: Starting from v8.5.2, the default value is `5`. Before v8.5.2, the default value is `3`. 
 + Unit: second
 
 ### `quota-backend-bytes`

markdown-pages/en/tidb/release-8.5/releases/release-8.5.2.md

@@ -95,6 +95,7 @@ Quick access: [Quick start](https://docs.pingcap.com/tidb/v8.5/quick-start-with-
     - Fix the issue that the `tidb_enable_tso_follower_proxy` system variable might not take effect [#8947](https://github.com/tikv/pd/issues/8947) @[JmPotato](https://github.com/JmPotato)
     - Fix the issue that a PD node might still generate TSOs even when it is not the Leader [#9051](https://github.com/tikv/pd/issues/9051) @[rleungx](https://github.com/rleungx)
     - Fix the issue that Region syncer might not exit in time during the PD Leader switch [#9017](https://github.com/tikv/pd/issues/9017) @[rleungx](https://github.com/rleungx)
+    - Fix the issue that the default value of `lease` is not correctly set [#9156](https://github.com/tikv/pd/issues/9156) @[rleungx](https://github.com/rleungx)
 
 + TiFlash