deps: make V8 14.2 ABI-compatible with 14.1

- Revert increase of `V8_EMBEDDER_DATA_TAG_COUNT`
  Refs: v8/v8@ef4972e

Author: targos

deps/v8/include/v8-internal.h

@@ -424,7 +424,7 @@ constexpr size_t kMaxCppHeapPointers = 0;
 // The number of tags reserved for embedder data stored in internal fields. The
 // value is picked arbitrarily, and is slightly larger than the number of tags
 // currently used in Chrome.
-#define V8_EMBEDDER_DATA_TAG_COUNT 15
+#define V8_EMBEDDER_DATA_TAG_COUNT 5
 
 // Generic tag range struct to represent ranges of type tags.
 //