fix(typo): Migration guide v5 to v6 missing Integration postfix (#12027)

Author: krystofwoldrich

docs/platforms/react-native/migration/v5-to-v6.mdx

@@ -226,7 +226,7 @@ Sentry.init({
 -    new Sentry.ReactNativeTracing({
 -      idleTimeout: 1_000,
 -      maxTransactionDuration: 5_000,
-+    Sentry.reactNativeTracing({
++    Sentry.reactNativeTracingIntegration({
 +      idleTimeoutMs: 1_000,
 +      finalTimeoutMs: 5_000,
     }),