[Security] Stop using a shared changelog for our security packages

Nyholm · wouterj · commit c565eecc19c4 · 2021-04-13T14:08:26.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -0,0 +1,7 @@
+CHANGELOG
+=========
+
+5.3
+---
+
+The CHANGELOG for version 5.3 and earlier can be found at https://github.com/symfony/symfony/blob/5.3/src/Symfony/Component/Security/CHANGELOG.md
