docs(nestjs): Update verify snippet for nestjs (#10774)

Author: nicohrubec

platform-includes/getting-started-verify/javascript.nestjs.mdx

@@ -1,14 +1,6 @@
-```javascript {"onboardingOptions": {"performance": "1-4, 12"}}
-Sentry.startSpan({
-  op: "test",
-  name: "My First Test Span",
-}, () => {
-  setTimeout(() => {
-    try {
-      foo();
-    } catch (e) {
-      Sentry.captureException(e);
-    }
-  }, 99);
-});
+```javascript
+@Get("/debug-sentry")
+getError() {
+  throw new Error("My first Sentry error!");
+}
 ```