[DOC]: Fix link errors pointing to the C/C++ docs in the cuGraph site

[acostadon]

How would you describe the priority of this documentation request

Critical (currently preventing usage)

Please provide a link or source to the relevant docs

https://github.com/rapidsai/cugraph/blob/branch-24.02/docs/cugraph/source/graph_support/algorithms.md

Describe the problems in the documentation

(https://github.com/rapidsai/cugraph/blob/branch-24.02/docs/cugraph/source/graph_support/cpp/src/traversal/README.md#BFS)

This is not the correct link...all the c/C++ README links are similarly incorrect

(Optional) Propose a correction

No response

Code of Conduct

• [X] I agree to follow cuGraph's Code of Conduct
• [X] I have searched the open documentation issues and have found no duplicates for this bug report