Update RoutingAPI lambda version to pick up new secrets (#405)

Author: mikeki

bin/stacks/routing-lambda-stack.ts

@@ -103,7 +103,7 @@ export class RoutingLambdaStack extends cdk.NestedStack {
 
       description: 'Routing Lambda',
       environment: {
-        VERSION: '5',
+        VERSION: '6',
         NODE_OPTIONS: '--enable-source-maps',
         POOL_CACHE_BUCKET: poolCacheBucket.bucketName,
         POOL_CACHE_BUCKET_2: poolCacheBucket2.bucketName,