docs: add v6.5.3 changelog

Author: cotes2020

docs/CHANGELOG.md

@@ -11,6 +11,8 @@ All notable changes to this project will be documented in this file. See [standa
 
 ## [6.5.3](https://github.com/cotes2020/jekyll-theme-chirpy/compare/v6.5.2...v6.5.3) (2024-03-07)
 
+* replace `polyfill.io` with `cdnjs` hosted link ([#1598](https://github.com/cotes2020/jekyll-theme-chirpy/pull/1598)) ([75a3d73](https://github.com/cotes2020/jekyll-theme-chirpy/commit/75a3d7399b257256a09d602cbe01062fe1cdf68d))
+
 ## [6.5.2](https://github.com/cotes2020/jekyll-theme-chirpy/compare/v6.5.1...v6.5.2) (2024-02-29)
 
 ### Bug Fixes