[serializer] Fix -Wshadow warnings

Bug: v8:12244,v8:12245
Change-Id: I801821448459bf2b74c99b36f6882d59bb24a273
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3264645Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77776}

src/snapshot/serializer.h

@@ -350,7 +350,7 @@ class Serializer : public SerializerDeserializer {
 
   // Disallow GC during serialization.
   // TODO(leszeks, v8:10815): Remove this constraint.
-  DISALLOW_GARBAGE_COLLECTION(no_gc)
+  DISALLOW_GARBAGE_COLLECTION(no_gc_)
 
   Isolate* isolate_;
   HotObjectsList hot_objects_;