build: update list of installed cppgc headers

Author: targos

Diff for: tools/install.py

@@ -212,6 +212,7 @@ def wanted_v8_headers(options, files_arg, dest):
       'include/cppgc/internal/caged-heap-local-data.h',
       'include/cppgc/internal/caged-heap.h',
       'include/cppgc/internal/compiler-specific.h',
+      'include/cppgc/internal/conditional-stack-allocated.h',
       'include/cppgc/internal/finalizer-trait.h',
       'include/cppgc/internal/gc-info.h',
       'include/cppgc/internal/logging.h',
@@ -226,7 +227,6 @@ def wanted_v8_headers(options, files_arg, dest):
       'include/cppgc/cross-thread-persistent.h',
       'include/cppgc/custom-space.h',
       'include/cppgc/default-platform.h',
-      'include/cppgc/ephemeron-pair.h',
       'include/cppgc/explicit-management.h',
       'include/cppgc/garbage-collected.h',
       'include/cppgc/heap-consistency.h',