Fix typo

Author: alchemistmatt

docs/Changelog.html

@@ -17,7 +17,7 @@ <h1 class="pagetitle">MS-GF+ ChangeLog</h1>
       <b>v2019.06.20</b>
     </p>
     <ul>
-      <li>Allow the title line of a spectra in a .mgf file to have DatasetName.ScanStart.ScanEnd.Charge followed by a space and extra info</li>
+      <li>Allow the title line of spectra in a .mgf file to have DatasetName.ScanStart.ScanEnd.Charge followed by a space and extra info</li>
       <li>Output the Java version and OS information to the console</li>
       <li>Update jmzReader and jmzidentml dependencies</li>
     </ul>