node-api: address coverity report

Address missing initialization reported by coverity

Signed-off-by: Michael Dawson <midawson@redhat.com>
PR-URL: https://github.com/nodejs/node/pull/52584
Reviewed-By: Vladimir Morozov <vmorozov@microsoft.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Gabriel Schulhof <gabrielschulhof@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>

src/js_native_api_v8.cc

@@ -833,7 +833,7 @@ void Reference::WeakCallback(const v8::WeakCallbackInfo<Reference>& data) {
  */
 class ExternalWrapper {
  private:
-  explicit ExternalWrapper(void* data) : data_(data) {}
+  explicit ExternalWrapper(void* data) : data_(data), type_tag_{0, 0} {}
 
   static void WeakCallback(const v8::WeakCallbackInfo<ExternalWrapper>& data) {
     ExternalWrapper* wrapper = data.GetParameter();