Add new Connector/NET bug.

Author: bgrainger

docs/content/tutorials/migrating-from-connector-net.md

@@ -212,3 +212,4 @@ The following bugs in Connector/NET are fixed by switching to MySqlConnector. (~
 * [#97448](https://bugs.mysql.com/bug.php?id=97448): Connecting fails if more than one IP is found in DNS for a named host
 * [#97473](https://bugs.mysql.com/bug.php?id=97473): `MySqlConnection.Clone` discloses connection password
 * [#97738](https://bugs.mysql.com/bug.php?id=97738): Cannot use PEM files when account uses `require subject`
+* [#97872](https://bugs.mysql.com/bug.php?id=97872): `KeepAlive` in connection string throws exception on .NET Core