httpcaddyfile: update nested-route fixture to retain all handlers

The old expected JSON captured the handler-dropping bug. Keep invoke and the following response in each named route, matching the corrected adapter.

Regression fixture for scan report 99a222bd-3c1e-4096-b94d-43076920963c.

Code written by GitHub Copilot (GPT-6.1 Sol, Claude Opus 5.5); reviewed by mholt.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

caddytest/integration/caddyfile_adapt/invoke_nested_named_routes.caddyfiletest

@@ -54,6 +54,10 @@
 								{
 									"handler": "invoke",
 									"name": "b"
+								},
+								{
+									"body": "a",
+									"handler": "static_response"
 								}
 							]
 						},
@@ -62,6 +66,10 @@
 								{
 									"handler": "invoke",
 									"name": "c"
+								},
+								{
+									"body": "b",
+									"handler": "static_response"
 								}
 							]
 						},
@@ -95,6 +103,10 @@
 								{
 									"handler": "invoke",
 									"name": "loop2"
+								},
+								{
+									"body": "loop1",
+									"handler": "static_response"
 								}
 							]
 						},
@@ -103,6 +115,10 @@
 								{
 									"handler": "invoke",
 									"name": "loop1"
+								},
+								{
+									"body": "loop2",
+									"handler": "static_response"
 								}
 							]
 						}