Update Broken Links in README.md (#3924)

Closes #3915 

This PR fixes two broken links in our README.md file.

Authors:
  - Ralph Liu (https://github.com/nv-rliu)

Approvers:
  - Don Acosta (https://github.com/acostadon)
  - Brad Rees (https://github.com/BradReesWork)

URL: #3924

README.md

@@ -43,8 +43,8 @@
   - [Contributing to cuGraph](./readme_pages/CONTRIBUTING.md)
 - General
   - [Latest News](./readme_pages/news.md)
-  - [Current list of algorithms](./readme_pages/algorithms.md)
-  - [Blogs and Presentation](./docs/cugraph/source/basics/cugraph_blogs.rst)
+  - [Current list of algorithms](./docs/cugraph/source/graph_support/algorithms.md)
+  - [Blogs and Presentation](./docs/cugraph/source/tutorials/cugraph_blogs.rst)
   - [Performance](./readme_pages/performance/performance.md)
 - Packages
   - [cuGraph Python](./readme_pages/cugraph_python.md)