docs(js): Fix nestjs snippet (#14052)

Author: chargome

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

@@ -1,5 +1,5 @@
 ```typescript {filename: instrument.ts}
-const Sentry = require("@sentry/nestjs");
+import * as Sentry from "@sentry/nestjs";
 // ___PRODUCT_OPTION_START___ profiling
 const { nodeProfilingIntegration } = require("@sentry/profiling-node");
 // ___PRODUCT_OPTION_END___ profiling