Update pending changelog
Adds pending changes to the CHANGELOG_PENDING.md file.
-## SDK Features
+### SDK Features
-## SDK Enhancements
+### SDK Enhancements
+* `aws/request`: Add retry support for RequestTimeoutException (#1158)
+ * Adds support for retrying RequestTimeoutException error code that is returned by some services.
-## SDK Bugs
+### SDK Bugs
+* `private/model/api`: Fix Waiter and Paginators panic on nil param inputs (#1157)
+ * Corrects the code generation for Paginators and waiters that caused a panic if nil input parameters were used with the operations.
