test(internal/docfx): fix expected number of pages in test (#8437)

diff --git a/internal/godocfx/godocfx_test.go b/internal/godocfx/godocfx_test.go
index 35cface..4574361 100644
--- a/internal/godocfx/godocfx_test.go
+++ b/internal/godocfx/godocfx_test.go
@@ -70,7 +70,7 @@
 	if got, want := len(r.toc), 1; got != want {
 		t.Fatalf("Parse got len(toc) = %d, want %d", got, want)
 	}
-	if got, want := len(r.pages), 29; got != want {
+	if got, want := len(r.pages), 33; got != want {
 		t.Errorf("Parse got len(pages) = %d, want %d", got, want)
 	}
 	if got := r.module.Path; got != mod {