remove redundant . from Scala 2 coursier download instructions

Author: soronpo

_includes/downloads-scala2.html

@@ -12,7 +12,7 @@ <h2>Ways to Install This Release</h2>
         Using <a
           href="https://docs.scala-lang.org/getting-started/index.html#using-the-scala-installer-recommended-way">Coursier
           CLI</a>, run:<br>
-        <code>cs install scala:{{ page.release_version }} && cs install scalac:{{ page.release_version }}</code>.
+        <code>cs install scala:{{ page.release_version }} && cs install scalac:{{ page.release_version }}</code>
       </li>
       <li>
 	      <div id="download-binaries"></div>Download the Scala binaries for <span id="users-os"></span>