docs: replace broken link to mismatch_relations.yml in mismatch_data.md

Author: Shrishti1701

doc/mismatch_data.md

@@ -43,5 +43,5 @@ To use a specific database file, use `--database` flag:
 If you find invalid relationship, please do following:
 
 - Fork the [repo](https://github.com/intel/cve-bin-tool)
-- Update the `mismatch_data/` directory with purl-invalid_vendor information like [this](../data/pypi/zstandard/mismatch_relations.yml)
+- Update the `mismatch_data/` directory with purl-invalid_vendor information like [this](../mismatch_data/pypi/zstandard/mismatch_relations.yml)
 - Create a pull request with the details of update. [Reference](https://github.com/intel/cve-bin-tool/pull/4239)