bump version to v2.4.1 (#982)

* bump version to v2.4.1

* update doc

Author: suchen-sci

CHANGELOG.md

@@ -1,5 +1,19 @@
 # Changelog
 
+## [v2.4.1](https://github.com/megaease/easegress/tree/v2.4.1) (2023-04-21)
+
+[Full Changelog](https://github.com/megaease/easegress/compare/v2.4.0...v2.4.1)
+
+**Implemented enhancements:**
+* Add a new filter: Simple HTTP Proxy.
+* Add a Canary Release cookbook.
+* Add a ChatGPT Bot cookbook.
+
+**Fixed bugs:**
+* Fix the Sampler's incorrect result bug
+* Fix OIDCAdaptor bug.
+* Fix typo and other minor problems in the documentation. 
+
 ## [v2.4.0](https://github.com/megaease/easegress/tree/v2.4.0) (2023-03-03)
 
 [Full Changelog](https://github.com/megaease/easegress/compare/v2.3.1...v2.4.0)

Makefile

@@ -16,7 +16,7 @@ INTEGRATION_TEST_PATH := build/test
 IMAGE_NAME?=megaease/easegress
 
 # Version
-RELEASE?=v2.4.0
+RELEASE?=v2.4.1
 
 # Git Related
 GIT_REPO_INFO=$(shell cd ${MKFILE_DIR} && git config --get remote.origin.url)