fix(potentiometer): emit value in detail property

Currently, we emit an `input` even whenever the potentiometer value changes. This is on par with how `<input type="range">` works.

However, the InputEvent emitted by `range` does not include any `data` property, and MDN says that "data" should include only the inserted characters, if any:

https://developer.mozilla.org/en-US/docs/Web/API/InputEvent/data

Thus, we use the `detail` property instead, which is also consistent with what we do in the membrane-keypad element.

Author: urish

src/potentiometer-element.ts

@@ -174,6 +174,6 @@ export class PotentiometerElement extends LitElement {
     const clamped = this.clamp(this.min, this.max, value);
     const updated = Math.round(clamped / this.step) * this.step;
     this.value = Math.round(updated * 100) / 100;
-    this.dispatchEvent(new InputEvent('input', { data: `${this.value}` }));
+    this.dispatchEvent(new InputEvent('input', { detail: this.value }));
   }
 }