Merge #11804: [docs] Fixed outdated link with archive.is

bf20a7d [docs] Fixed outdated link with archive.is (Tim Shimmin)

Tree-SHA512: 7d316aa4c462213578a9a1e71b06a459924ed3bb681a0469cc3719b21a871a6350fff4656696057e362561ee10dc10e933fe1328ef454ab7e133ecf05549ec1c

Author: laanwj

src/test/README.md

@@ -52,4 +52,4 @@ examine `uint256_tests.cpp`.
 
 For further reading, I found the following website to be helpful in
 explaining how the boost unit test framework works:
-[http://www.alittlemadness.com/2009/03/31/c-unit-testing-with-boosttest/](http://www.alittlemadness.com/2009/03/31/c-unit-testing-with-boosttest/).
+[http://www.alittlemadness.com/2009/03/31/c-unit-testing-with-boosttest/](http://archive.is/dRBGf).