Update index.html

Author: rainliu

index.html

@@ -130,7 +130,7 @@
           <input type="checkbox" id="stun" name="stun" disabled="disabled" checked="checked"> <label for="stun">STUN</label>
           <a href="https://crates.io/crates/rtc-stun"><img src="https://img.shields.io/crates/v/rtc-stun.svg"></a>
           &nbsp;
-          <input type="checkbox" id="turn" name="turn" disabled="disabled"> <label for="turn">TURN</label>
+          <input type="checkbox" id="turn" name="turn" disabled="disabled" checked="checked"> <label for="turn">TURN</label>
           <a href="https://crates.io/crates/rtc-turn"><img src="https://img.shields.io/crates/v/rtc-turn.svg"></a>
           &nbsp;
           <input type="checkbox" id="ice" name="ice" disabled="disabled" checked="checked"> <label for="ice">ICE</label>