[compression helper] Fix copy-paste error

Author: marijnh

doc/compress.html

@@ -101,7 +101,7 @@ <h1><span class="logo-braces">{ }</span> <a href="http://codemirror.net/">CodeMi
           <option value="http://codemirror.net/mode/lua/lua.js">lua.js</option>
           <option value="http://codemirror.net/mode/markdown/markdown.js">markdown.js</option>
           <option value="http://codemirror.net/mode/mirc/mirc.js">mirc.js</option>
-          <option value="http://codemirror.net/mode/nginx/nginx.js">ntriples.js</option>
+          <option value="http://codemirror.net/mode/nginx/nginx.js">nginx.js</option>
           <option value="http://codemirror.net/mode/ntriples/ntriples.js">ntriples.js</option>
           <option value="http://codemirror.net/mode/ocaml/ocaml.js">ocaml.js</option>
           <option value="http://codemirror.net/mode/pascal/pascal.js">pascal.js</option>