Merge pull request #1133 from eclipse-tractusx/docs/delete-cx-ng-references

docs: delete reference to catena-x ng

Author: stephanbcbauer

docs/release/trg-5/trg-5-02.md

@@ -53,8 +53,7 @@ Structure](../trg-2/trg-2-3.md).
 It is **mandatory to add a valid license/copyright header** to each file (except of rendered files, e.g. Markdown files) in the
 Git repository!
 
-For further details, please refer to [How to make your Catena-X product OSS
-ready](https://github.com/catenax-ng/foss-example#how-to-make-your-catenax-product-oss-ready).
+For further details, please refer to [TRG 2.03](../trg-2/trg-2-3.md).
 
 :::