docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#88)

Automated changelog update created by the LangGraph Server Changelog
Bot.

Feel free to merge anytime.

Author: samecrowder

src/langgraph-platform/langgraph-server-changelog.mdx

@@ -5,6 +5,14 @@ sidebarTitle: Server changelog
 
 [LangGraph Server](/langgraph-platform/langgraph-server) is an API platform for creating and managing agent-based applications. It provides built-in persistence, a task queue, and supports deploying, configuring, and running assistants (agentic workflows) at scale. This changelog documents all notable updates, features, and fixes to LangGraph Server releases.
 
+<a id="2025-07-31"></a>
+## v0.2.116
+- Reduced the default number of history checkpoints from 10 to 1 to optimize performance.
+
+<a id="2025-07-31"></a>
+## v0.2.115
+- Optimized cache re-use to enhance application performance and efficiency.
+
 <a id="2025-07-30"></a>
 ## v0.2.113
 - Improved thread search pagination by updating response headers with `X-Pagination-Total` and `X-Pagination-Next` for better navigation.