docs: add Momentum Dev to FAP flasher

Author: OyczE

docs/flipper_fap.html

@@ -182,6 +182,7 @@ <h2>Control</h2>
               <label for="trackSelect">Firmware track</label>
               <select id="trackSelect">
                 <option value="momentum" selected>Momentum</option>
+                <option value="momentum dev">Momentum Dev</option>
                 <option value="unleashed">Unleashed</option>
               </select>
             </div>