Rename HTTP/3 SETTINGS_MAX_HEADER_LIST_SIZE to SETTINGS_MAX_FIELD_SECTION_SIZE.

This matches https://datatracker.ietf.org/doc/html/draft-ietf-quic-http-30#section-7.2.4.1.

PiperOrigin-RevId: 332947488
Change-Id: I2546a3b3c437567ab160805bae19fdcb53a0c935
diff --git a/quic/core/http/http_constants.h b/quic/core/http/http_constants.h
index 8a3436c..5164a4b 100644
--- a/quic/core/http/http_constants.h
+++ b/quic/core/http/http_constants.h
@@ -30,7 +30,7 @@
   // Same value as spdy::SETTINGS_HEADER_TABLE_SIZE.
   SETTINGS_QPACK_MAX_TABLE_CAPACITY = 0x01,
   // Same value as spdy::SETTINGS_MAX_HEADER_LIST_SIZE.
-  SETTINGS_MAX_HEADER_LIST_SIZE = 0x06,
+  SETTINGS_MAX_FIELD_SECTION_SIZE = 0x06,
   SETTINGS_QPACK_BLOCKED_STREAMS = 0x07,
 };