docs: add dirty arbiters to navigation and changelog

docs/content/2026-news.md

@@ -1,6 +1,23 @@
 <span id="news-2026"></span>
 # Changelog - 2026
 
+## 25.0.0 - unreleased
+
+### New Features
+
+- **Dirty Arbiters**: Separate process pool for executing long-running, blocking
+  operations (AI model loading, heavy computation) without blocking HTTP workers
+  ([PR #3460](https://github.com/benoitc/gunicorn/pull/3460))
+  - Inspired by Erlang's dirty schedulers
+  - Asyncio-based with Unix socket IPC
+  - Stateful workers that persist loaded resources
+  - New settings: `--dirty-app`, `--dirty-workers`, `--dirty-timeout`,
+    `--dirty-threads`, `--dirty-graceful-timeout`
+  - Lifecycle hooks: `on_dirty_starting`, `dirty_post_fork`,
+    `dirty_worker_init`, `dirty_worker_exit`
+
+---
+
 ## 24.1.1 - 2026-01-24
 
 ### Bug Fixes

docs/content/news.md

@@ -1,6 +1,15 @@
 <span id="news"></span>
 # Changelog
 
+## 25.0.0 - unreleased
+
+### New Features
+
+- **Dirty Arbiters**: Separate process pool for long-running blocking operations
+  (ML model loading, heavy computation) - inspired by Erlang dirty schedulers
+
+---
+
 ## 24.1.1 - 2026-01-24
 
 ### Bug Fixes

mkdocs.yml

@@ -16,6 +16,7 @@ nav:
       - Deploy: deploy.md
       - Docker: guides/docker.md
       - ASGI Worker: asgi.md
+      - Dirty Arbiters: dirty.md
       - uWSGI Protocol: uwsgi.md
       - Signals: signals.md
       - Instrumentation: instrumentation.md