Fixed case of link to reml.html

Author: delphidabbler

csdb/docs/collection-format.html

@@ -580,7 +580,7 @@ <h1>
   <ol>
     <li id="footnote-1">
       <p>
-        REML is a text markup language used to format text. REML version 4 is supported. The REML format is documented in <a href="REML.html">REML.html</a>.
+        REML is a text markup language used to format text. REML version 4 is supported. The REML format is documented in <a href="reml.html">reml.html</a>.
        </p>
     </li>
     <li id="footnote-2">