Merge pull request #4920 from quicwg/ecn-counts

ECN Counts; last fix

rfc9000.md

@@ -5598,7 +5598,7 @@ ACK Ranges:
 
 ECN Counts:
 
-: The three ECN Counts; see {{ack-ecn-counts}}.
+: The three ECN counts; see {{ack-ecn-counts}}.
 
 
 ### ACK Ranges {#ack-ranges}
@@ -5674,7 +5674,7 @@ connection error of type FRAME_ENCODING_ERROR.
 The ACK frame uses the least significant bit of the type value (that is, type
 0x03) to indicate ECN feedback and report receipt of QUIC packets with
 associated ECN codepoints of ECT(0), ECT(1), or ECN-CE in the packet's IP
-header.  ECN Counts are only present when the ACK frame type is 0x03.
+header.  ECN counts are only present when the ACK frame type is 0x03.
 
 When present, there are three ECN counts, as shown in {{ecn-count-format}}.
 
@@ -5687,7 +5687,7 @@ ECN Counts {
 ~~~
 {: #ecn-count-format title="ECN Count Format"}
 
-The three ECN Counts are:
+The ECN count fields are:
 
 ECT0 Count:
 : A variable-length integer representing the total number of packets received