Add changelog entry for openSSL 1.1.1zg update (aws#10225)

Author: AndrewAsseily

.changes/next-release/enhancement-openssl-98189.json

@@ -0,0 +1,5 @@
+{
+  "type": "enhancement",
+  "category": "openssl",
+  "description": "Update bundled OpenSSL version to 1.1.1zg for Linux installers"
+}