docs: updated broken links in ReadMe and evaluation documentation (#1847)

fixed empty app.ragas.io link in evals.md and Readme.md

Author: iamarunbrahma

README.md

@@ -84,7 +84,7 @@ Find the complete [Quickstart Guide](https://docs.ragas.io/en/latest/getstarted/
 
 ### Analyze your Evaluation
 
-Sign up for [app.ragas.io]() to review, share and analyze your evaluations</a>
+Sign up for [app.ragas.io](https://app.ragas.io) to review, share and analyze your evaluations</a>
 
 <p align="left">
     <img src="docs/getstarted/ragas_get_started_evals.gif" height="300">

docs/getstarted/evals.md

@@ -169,7 +169,7 @@ Viewing the sample-level results in a CSV file, as shown above, is fine for quic
 
 ## Analyzing Results
 
-For this you may sign up and setup [app.ragas.io]() easily. If not, you may use any alternative tools available to you. 
+For this you may sign up and setup [app.ragas.io](https://app.ragas.io) easily. If not, you may use any alternative tools available to you. 
 
 In order to use the [app.ragas.io](http://app.ragas.io) dashboard, you need to have an account on [app.ragas.io](https://app.ragas.io/). If you don't have one, you can sign up for one [here](https://app.ragas.io/login). You will also need to generate a [Ragas APP token](https://app.ragas.io/dashboard/settings/app-tokens).