Add link for CodeQL zero to hero part 5

Author: sylwia-budzynska

README.md

@@ -5,4 +5,4 @@ Challenges, CodeQL queries, CodeQL databases, and material for the CodeQL Zero t
 - [CodeQL zero to hero part 2: getting started with CodeQL](https://github.blog/2023-06-15-codeql-zero-to-hero-part-2-getting-started-with-codeql/)
 - [CodeQL zero to hero part 3: security research](https://github.blog/2024-04-29-codeql-zero-to-hero-part-3-security-research-with-codeql/)
 - [CodeQL zero to hero part 4: Gradio case study](https://github.blog/security/vulnerability-research/codeql-zero-to-hero-part-4-gradio-framework-case-study/)
-- CodeQL zero to hero part 5: debugging queries
+- [CodeQL zero to hero part 5: debugging queries](https://github.blog/security/vulnerability-research/codeql-zero-to-hero-part-5-debugging-queries/)