Update/fix1 1

updated airtel api to correct end point

added postman logos, removed deadlinks, created popular APIs and Cate…

added new api

added new api

MFaaS returns http code 404 when accessed

resolve #3097

WeatherReactApi returns http code 404 when accessed

Utelly returns http code 404 when accessed

Sentium returns http code 503 when accessed

Tennis-data returns http code 404 when accessed

Daraz Data returns http code 404 when accessed

Quadratic Solver  returns http code 404 when accessed

UK government API catalogue returns http code 404 when accessed

City, Kyiv returns http code 522 when accessed

Live precious metal prices returns http code 500 when accessed

UnixTime Converter returns http code 522 when accessed

This reverts commit 18f105a843.

This reverts commit 96e9033d42.

This reverts commit 8e5806cc90.

This reverts commit 1f2645758d.