Fix invalid Exception syntax

Author: aliu39

docs/platforms/javascript/common/configuration/integrations/featureflags.mdx

@@ -63,7 +63,7 @@ if (flagsIntegration) {
 } else {
   // check your configure step
 }
-Sentry.captureException(Exception('broke'));
+Sentry.captureException(new Error('broke'));
 ```
 
 Visit the Sentry website and confirm that your error event has recorded the feature flag "hello" and its value "false".

docs/platforms/javascript/common/configuration/integrations/launchdarkly.mdx

@@ -69,7 +69,7 @@ import * as LaunchDarkly from 'launchdarkly-js-client-sdk';
 // You may have to wait for your client to initialize before doing this.
 ldClient?.variation("hello", false);
 
-Sentry.captureException(Exception("Something went wrong!"))
+Sentry.captureException(new Error("Something went wrong!"))
 ```
 
 Visit the Sentry website and confirm that your error event has recorded the feature flag "hello" and its value "false".

docs/platforms/javascript/common/configuration/integrations/openfeature.mdx

@@ -73,7 +73,7 @@ import { OpenFeature } from '@openfeature/web-sdk';
 const client = OpenFeature.getClient();
 const result = client.getBooleanValue('hello', false);
 
-Sentry.captureException(Exception("Something went wrong!"))
+Sentry.captureException(new Error("Something went wrong!"))
 ```
 
 Visit the Sentry website and confirm that your error event has recorded the feature flag "hello" and its value "false".