BUG/MINOR: quic_stats: Duplicate "quic_streams_data_blocked_bidi" field name

As reported by broxio in GH #1757, there was a duplication field name
for "quic_streams_data_blocked_bidi", due to a copy and paste without
renaming I guess.

Must be backported to 2.6.
diff --git a/src/quic_stats.c b/src/quic_stats.c
index 1697710..160ee7d 100644
--- a/src/quic_stats.c
+++ b/src/quic_stats.c
@@ -68,7 +68,7 @@
 	                                        .desc = "Total number of received STREAMS_BLOCKED frames" },
 	[QUIC_ST_STREAMS_DATA_BLOCKED_BIDI] = { .name = "quic_streams_data_blocked_bidi",
 	                                        .desc = "Total number of received STREAM_DATA_BLOCKED_BIDI frames" },
-	[QUIC_ST_STREAMS_DATA_BLOCKED_UNI]  = { .name = "quic_streams_data_blocked_bidi",
+	[QUIC_ST_STREAMS_DATA_BLOCKED_UNI]  = { .name = "quic_streams_data_blocked_uni",
 	                                        .desc = "Total number of received STREAM_DATA_BLOCKED_UNI frames" },
 };