Finalise ChangeLog

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
diff --git a/ChangeLog b/ChangeLog
index 9578ffd..e673c70 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,6 @@
 Mbed TLS ChangeLog (Sorted per branch, date)
 
-= Mbed TLS x.x.x branch released xxxx-xx-xx
+= Mbed TLS 3.6.3 branch released 2025-03-24
 
 Default behavior changes
    * In TLS clients, if mbedtls_ssl_set_hostname() has not been called,