chore: add placeholder version in README.md file (#1762)

ti-chi-bot · web-flow · commit 358548e82b7b · 2024-12-19T05:47:36.000Z
diff --git a/README.md b/README.md
@@ -87,3 +87,5 @@ Copyright 2020 PingCAP, Inc.
 
 [pd]: https://github.com/pingcap/pd
 [asktug.com]: https://asktug.com/
+
+<!-- VERSION_PLACEHOLDER: v8.5.0 -->
