changelog: fix grammar

CHANGELOG.md

@@ -6,13 +6,13 @@
 
 This security release fixes:
 
-### Denial of service 1
+### Denial of Service 1
 
-Tendermint 0.33.2 and earlier does not limit P2P connection requests number.
-For each p2p connection, Tendermint allocates ~0.5MB. Even though this
-memory is garbage collected once the connection is terminated (due to duplicate
-IP or reaching a maximum number of inbound peers), temporary memory spikes can
-lead to OOM (Out-Of-Memory) exceptions.
+Tendermint 0.33.2 and earlier does not limit the number of P2P connection
+requests. For each p2p connection, Tendermint allocates ~0.5MB. Even though
+this memory is garbage collected once the connection is terminated (due to
+duplicate IP or reaching a maximum number of inbound peers), temporary memory
+spikes can lead to OOM (Out-Of-Memory) exceptions.
 
 Tendermint 0.33.3 (and 0.32.10) limits the total number of P2P incoming
 connection requests to to `p2p.max_num_inbound_peers +
@@ -27,7 +27,7 @@ Notes:
   (https://www.nginx.com/blog/rate-limiting-nginx/). We may implement this in
   the future ([\#1696](https://github.com/tendermint/tendermint/issues/1696)).
 
-### Denial of service 2
+### Denial of Service 2
 
 Tendermint 0.33.2 and earlier does not reclaim `activeID` of a peer after it's
 removed in `Mempool` reactor. This does not happen all the time. It only
@@ -36,7 +36,7 @@ added to all reactors. `RemovePeer` is therefore called before `AddPeer`, which
 leads to always growing memory (`activeIDs` map). The `activeIDs` map has a
 maximum size of 65535 and the node will panic if this map reaches the maximum.
 An attacker can create a lot of connection attempts (exploiting Denial of
-service 1), which ultimately will lead to the node panicking.
+Service 1), which ultimately will lead to the node panicking.
 
 Tendermint 0.33.3 (and 0.32.10) claims `activeID` for a peer in `InitPeer`,
 which is executed before `MConnection` is started.
@@ -45,7 +45,7 @@ Notes:
 
 - `InitPeer` function was added to all reactors to combat a similar issue -
   [\#3338](https://github.com/tendermint/tendermint/issues/3338);
-- Denial of service 2 is independent of Denial of service 1 and can be executed
+- Denial of Service 2 is independent of Denial of Service 1 and can be executed
   without it.
 
 **All clients are recommended to upgrade**