Switch to archive.org for site.icu-project.org

Author: koppor

docs/adr/0018-use-regular-expression-to-split-multiple-sentence-titles.md

@@ -8,7 +8,7 @@ Some entry titles are composed of multiple sentences, for example: "Whose Music?
 
 * [Regular expression](https://docs.oracle.com/javase/tutorial/essential/regex/)
 * [OpenNLP](https://opennlp.apache.org/)
-* [ICU4J](http://site.icu-project.org/home)
+* [ICU4J](https://web.archive.org/web/20210413013221/http://site.icu-project.org/home)
 
 ## Decision Outcome