quic: address recent coverity warning

Address coverity warning about uninitialized value

Signed-off-by: Michael Dawson <mdawson@devrus.com>
PR-URL: #47753
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

src/quic/data.h

@@ -129,7 +129,7 @@ class QuicError final : public MemoryRetainer {
   const uint8_t* reason_c_str() const;
 
   std::string reason_;
-  ngtcp2_connection_close_error error_;
+  ngtcp2_connection_close_error error_ = ngtcp2_connection_close_error();
   const ngtcp2_connection_close_error* ptr_ = nullptr;
 };