5.6.7 release note [ci skip]

nateberkopec · nateberkopec · commit d33424b560ea · 2023-08-18T10:24:45.000+09:00
diff --git a/History.md b/History.md
@@ -1,3 +1,8 @@
+## 5.6.7 / 2023-08-18
+
+* Security 
+  * Address HTTP request smuggling vulnerabilities with zero-length Content Length header and trailer fields ([GHSA-68xg-gqqm-vgj8](https://github.com/puma/puma/security/advisories/GHSA-68xg-gqqm-vgj8))
+
 ## 5.6.6 / 2023-06-21
 
 * Bugfix
