docs(devs-infra): fixed License link (#2543)

markdown extension was missing

README.md

@@ -9,7 +9,7 @@
   <a href="https://snyk.io/test/github/kulshekhar/ts-jest"><img src="https://snyk.io/test/github/kulshekhar/ts-jest/badge.svg?style=flat-square" alt="Known vulnerabilities"/> </a>
   <a href="https://coveralls.io/github/kulshekhar/ts-jest?branch=master"><img src="https://coveralls.io/repos/github/kulshekhar/ts-jest/badge.svg?branch=master" alt="Coverage status"/> </a>
   <a href="https://actions-badge.atrox.dev/kulshekhar/ts-jest/goto?ref=master"><img alt="GitHub actions" src="https://img.shields.io/endpoint.svg?url=https%3A%2F%2Factions-badge.atrox.dev%2Fkulshekhar%2Fts-jest%2Fbadge%3Fref%3Dmaster&style=flat-square" /> </a>
-  <a href="https://github.com/kulshekhar/ts-jest/blob/master/LICENSE"><img src="https://img.shields.io/npm/l/ts-jest.svg?style=flat-square" alt="GitHub license"/> </a>
+  <a href="https://github.com/kulshekhar/ts-jest/blob/master/LICENSE.md"><img src="https://img.shields.io/npm/l/ts-jest.svg?style=flat-square" alt="GitHub license"/> </a>
 </p>
 
 <img src="./icon.png" align="right" title="ts-jest Logo" width="128" height="128">