Fix the typing error identified in AudioWorklet Examples (#2576)

index.bs

@@ -12171,7 +12171,7 @@ class Bitcrusher extends AudioWorkletProcessor {
         // No need to return a value; this node's lifetime is dependent only on its
         // input connections.
     }
-});
+};
 
 registerProcessor('bitcrusher', Bitcrusher);
 </xmp>