fix forEach syntax

sketch.js

@@ -49,7 +49,7 @@ async function textGenTask(pre, prompt, blanks){
 
   var hyperparameters = { max_new_tokens: 60, top_k: 90, repetition_penalty: 1.5 }
 
-  promptArray.forEach(INPUT){
+  promptArray.forEach(INPUT => {
     // RUN INPUT THROUGH MODEL, 
     var out = await pipe(INPUT, hyperparameters)
     // setting hyperparameters