Update ChangeLog for upcoming v6.4 (#1524)

ChangeLog

@@ -1,18 +1,20 @@
-Changes in squid-6.4 (15 Oct 2023):
+Changes in squid-6.4 (22 Oct 2023):
 
 	- Regression: Restore support for legacy cache_object cache manager requests
 	- Regression: Do not use static initialization to register modules
 	- Bug 5301: cachemgr.cgi not showing new manager interface URLs
 	- Bug 5300: cachemgr.cgi assertion
-	- Fix handling of large HTTP headers in storeClientCopy()
-	- Fix store_client caller leak on certain errors
-	- Fix URL percent-encoding
-	- Miss if an HTTP 304 update would exceed reply_header_max_size
+	- Fix stack buffer overflow when parsing Digest Authorization
+	- Fix userinfo percent-encoding
+	- Fix store_client caller memory leak on certain errors
+	- Fix validation of certificates with CN=*
+	- Fix handling of large stored response headers
+	- Miss if a HTTP/304 update would exceed reply_header_max_size
+	- RFC 9112: Improve HTTP chunked encoding compliance
 	- HTTP: Improve handling of empty lines received prior to request-line
 	- Y2038: improve printing of time settings
 	- Extend cache_log_message to problematic from-helper annotations
-	- CI: More HTTP caching and revalidation tests
-	- CI: Improve test harness
+	- ... and several Continuous Integration improvements
 
 Changes in squid-6.3 (03 Sep 2023):