[MINOR] update link to P2P spec (#3679)

* update link to spec

Signed-off-by: Sally MacFarlane <sally.macfarlane@consensys.net>

CHANGELOG.md

@@ -31,7 +31,7 @@
 - Remove the experimental flag for bonsai tries CLI options `--data-storage-format` and `--bonsai-maximum-back-layers-to-load` [#3578](https://github.com/hyperledger/besu/pull/3578)
 
 ### Deprecations
-- `--tx-pool-hashes-max-size` is now deprecated and has no more effect and it will be removed in a future release.
+- `--tx-pool-hashes-max-size` is now deprecated and has no more effect, and it will be removed in a future release.
 
 ### Additions and Improvements
 - Tune transaction synchronization parameter to adapt to mainnet traffic [#3610](https://github.com/hyperledger/besu/pull/3610)

ethereum/p2p/src/main/java/org/hyperledger/besu/ethereum/p2p/rlpx/wire/messages/DisconnectMessage.java

@@ -101,8 +101,8 @@ public final class DisconnectMessage extends AbstractMessageData {
   /**
    * Reasons for disconnection, modelled as specified in the wire protocol DISCONNECT message.
    *
-   * @see <a href="https://github.com/ethereum/wiki/wiki/%C3%90%CE%9EVp2p-Wire-Protocol">ÐΞVp2p Wire
-   *     Protocol</a>
+   * @see <a href="https://github.com/ethereum/devp2p/blob/master/rlpx.md#disconnect-0x01">RLPx
+   *     Transport Protocol</a>
    */
   public enum DisconnectReason {
     UNKNOWN(null),