Add changelog

Author: kdaily

.changes/next-release/enhancement-configure-35911.json

@@ -0,0 +1,5 @@
+{
+  "type": "enhancement",
+  "category": "``configure``",
+  "description": "Add ability to configure sub-sections in the shared configuration file (fixes `#7835 <https://github.com/aws/aws-cli/issues/7835>`__)"
+}