Fix broken links in clients/ui folder (kubeflow#1015)

Signed-off-by: manaswinidas <[email protected]>

Author: manaswinidas

clients/ui/CONTRIBUTING.md

@@ -38,4 +38,4 @@ make kind-deployment
 
 ## Debugging and Testing
 
-See [frontend testing guidelines](docs/testing.md) for testing the frontend.
+See [frontend testing guidelines](frontend/docs/testing.md) for testing the frontend.

clients/ui/README.md

@@ -11,7 +11,7 @@ The Model Registry UI is a standalone web app for Kubeflow Model Registry. In th
 
 ## Contributing
 
-You can check the [contributing guidelines](../CONTRIBUTING.md) for more information on how to contribute to the Model Registry UI.
+You can check the [contributing guidelines] for more information on how to contribute to the Model Registry UI.
 
 ## OpenAPI Specification
 

clients/ui/frontend/docs/dev-setup.md

@@ -36,7 +36,7 @@ This is the default context for running a local UI.  Make sure you build the pro
 npm run start:dev
 ```
 
-For in-depth local run guidance review the [contribution guidelines](../CONTRIBUTING.md).
+For in-depth local run guidance review the [contribution guidelines](../../../ui/CONTRIBUTING.md).
 
 ### Testing