update changelog

Author: bcwu

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [1.15.1] - 2023-03-27
+## [1.16.0] - 2023-03-27
 
 ### Added
 - The `CONNECT_REQUEST_TIMEOUT` environment variable, which configures the request timeout for all blocking HTTP and HTTPS operations. This value translates into seconds (e.g., `CONNECT_REQUEST_TIMEOUT=60` is equivalent to 60 seconds.) By default, this value is 300.