Spring testing link fix

src/data/roadmaps/spring-boot/content/110-testing/index.md

@@ -4,6 +4,5 @@ Spring provides a set of testing utilities that make it easy to test the various
 
 For more information, visit the following links:
 
-- [Spring Testing](https://industrialphysics.com/knowledgebase/articles/spring-testing/)
 - [What Is Spring Testing?](https://www.developer.com/design/what-is-spring-testing/)
 - [Complete Guide To Spring Testing](https://www.lambdatest.com/blog/spring-testing/)