[DOC]: Fix readme links on Algo support page

[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://docs.rapids.ai/api/cugraph/nightly/graph_support/algorithms/

Describe the problems in the documentation

Links to the C and C++ API pages are broken

(Optional) Propose a correction

No response

Code of Conduct

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