Add end line/column support example

Author: haya14busa

index.html

@@ -24,6 +24,7 @@ <h1 id="title"><a href="https://reviewdog.github.io/errorformat-playground/">err
           <a href="https://git.io/Jes8V">tsc(TypeScript Compiler)</a>
           <a href="https://git.io/Jes8o">stylelint</a>
           <a href="https://git.io/Jes8K">sbt</a>
+          <a href="https://bit.ly/3rQBuWt">end line/column support</a>
       </p>
       <div>
         <label class="label" for="efms">Errorformats</label>