Add missing error string in QuicFramer

This was likely an oversight, the equivalent code for stream frames does have this string.

PiperOrigin-RevId: 699352264

quiche/quic/core/quic_framer.cc

diff --git a/quiche/quic/core/quic_framer.cc b/quiche/quic/core/quic_framer.cc
index 4e037f5..6418968 100644
--- a/quiche/quic/core/quic_framer.cc
+++ b/quiche/quic/core/quic_framer.cc
@@ -5209,6 +5209,7 @@
     QUICHE_DCHECK_EQ(nullptr, frame.data_buffer);
     if (!data_producer_->WriteCryptoData(frame.level, frame.offset,
                                          frame.data_length, writer)) {
+      set_detailed_error("Writing frame data from producer failed.");
       return false;
     }
   }