test: update CDK snapshots for RSC cache headers

Author: konokenj

cdk/test/__snapshots__/serverless-fullstack-webapp-starter-kit-without-domain.test.ts.snap

@@ -4094,6 +4094,10 @@ service iptables save",
                 "X-HTTP-Method-Override",
                 "X-HTTP-Method",
                 "X-Method-Override",
+                "RSC",
+                "Next-Router-Prefetch",
+                "Next-Router-State-Tree",
+                "Next-URL",
               ],
             },
             "QueryStringsConfig": {

cdk/test/__snapshots__/serverless-fullstack-webapp-starter-kit.test.ts.snap

@@ -3918,6 +3918,10 @@ service iptables save",
                 "X-HTTP-Method-Override",
                 "X-HTTP-Method",
                 "X-Method-Override",
+                "RSC",
+                "Next-Router-Prefetch",
+                "Next-Router-State-Tree",
+                "Next-URL",
               ],
             },
             "QueryStringsConfig": {