Fix for enhancement#1001: Google Code-in Task to update the error message

[Rithi-21]

Fix for enhancement#1001: Google Code-in Task to update the error message

As per Mentor's feedback, I fixed the error message so that it only show the host details of the host url.

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This is for Google Code-in Task. Updated the error message to add the URL of the API end point to the end of the existing error message. Currently it shows as " Please check the Host URL" and it is modified to add the host url at the end of this message. ex: if the CLI is not able to connect to https://api.evalai.example the error should be "Could not establish connection to EvalAI. Please check the Host URL: https://api.evalai.example".

[yashdusing]

LGTM. nvm previous comment. 👍