Don't directly run the /utilities fetch; update prop instead

src/state-calculator.ts

@@ -201,7 +201,8 @@ export class RewiringAmericaStateCalculator extends LitElement {
                   error: () => [BLANK_UTILITY],
                 }) as OptionParam[],
                 (event: SubmitEvent) => this.submit(event),
-                () => this._utilityOptionsTask.run(),
+                (event: InputEvent) =>
+                  (this.zip = (event.target as HTMLInputElement).value),
               )}
         </div>
         ${this.hideResult