Add note about filtering

Author: darksidelemm

index.html

@@ -114,7 +114,7 @@ <h2>Under Beta!</h2>
             <br/>
             This site uses data from the <a href="https://github.com/projecthorus/sondehub-infra/wiki" target="_blank">SondeHub v2</a> database, which will remove the radiosonde  
             load from the Habitat tracking database. We are still working to being this tracker up to feature-parity with the previous
-            tracker, so some features like recovered sonde icons are still in-progress.
+            tracker, so some features like recovered sonde icons and filtering by serial and type are still in-progress.
             <br/>
             Chase Cars can show up on the map using this tracker's chase-car features (look for the car icon at top-right) 
             or upload their position from <a href="https://github.com/projecthorus/chasemapper" target="_blank">Chasemapper</a>.