feat: add documentation (#8593)

docs/api/puppeteer.jshandle.dispose.md

@@ -0,0 +1,19 @@
+---
+sidebar_label: JSHandle.dispose
+---
+
+# JSHandle.dispose() method
+
+Stops referencing the element handle, and resolves when the object handle is successfully disposed of.
+
+**Signature:**
+
+```typescript
+class JSHandle {
+  dispose(): Promise<void>;
+}
+```
+
+**Returns:**
+
+Promise&lt;void&gt;