fix: collection page title for nested paths

packages/core/dev-test/index.html

@@ -150,6 +150,17 @@
             'index.md': {
               content: '---\ntitle: Posts\n---\n',
             },
+            news: {
+              'hello-world-news': {
+                'index.md': {
+                  content:
+                    '---\ntitle: Hello World News\n---\nCoffee is a small tree or shrub that grows in the forest understory in its wild form, and traditionally was grown commercially under other trees that provided shade. The forest-like structure of shade coffee farms provides habitat for a great number of migratory and resident species.\n',
+                },
+              },
+              'index.md': {
+                content: '---\ntitle: News Articles\n---\n',
+              },
+            },
           },
           'index.md': {
             content: '---\ntitle: Pages\n---\n',