key_updated / key_discarded: rename generation to key_phase

draft-ietf-quic-qlog-quic-events.md

@@ -1160,7 +1160,7 @@ SecurityKeyUpdated = {
     ? new: hexstring
 
     ; needed for 1RTT key updates
-    ? generation: uint32
+    ? key_phase: uint64
     ? trigger:
         ; (e.g., initial, handshake and 0-RTT keys
         ; are generated by TLS)
@@ -1171,6 +1171,9 @@ SecurityKeyUpdated = {
 ~~~
 {: #security-keyupdated-def title="SecurityKeyUpdated definition"}
 
+Note that the key_phase is the full value of the key phase (as indicated by
+@M and @N in Figure 9 of {{!QUIC-TLS=RFC9001}}). The key phase bit used on
+the packet header is the least significant bit of the key phase.
 
 ## key_discarded {#security-keydiscarded}
 
@@ -1183,7 +1186,7 @@ SecurityKeyDiscarded = {
     ? key: hexstring
 
     ; needed for 1RTT key updates
-    ? generation: uint32
+    ? key_phase: uint64
     ? trigger:
         ; (e.g., initial, handshake and 0-RTT keys
         ; are generated by TLS)