fix: OnGainedOwnership and OnLostOwnership XML API updates (#3365)

Correcting the XML API documentation for OnGainedOwnership and
OnLostOwnership when using a distributed authority network topology.

[MTTB-1086](https://jira.unity3d.com/browse/MTTB-1086)

fix: #3345

## Changelog
NA

## Testing and Documentation

- No tests have been added.
- Includes edits to existing public API documentation.

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### Deprecated API
- [ ] An `[Obsolete]` attribute was added along with a `(RemovedAfter
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Author: NoelStephensUnity

com.unity.netcode.gameobjects/Runtime/Core/NetworkBehaviour.cs

@@ -826,7 +826,7 @@ internal void InternalOnNetworkDespawn()
 
         /// <summary>
         /// In client-server contexts, this method is invoked on both the server and the local client of the owner when <see cref="Netcode.NetworkObject"/> ownership is assigned.
-        /// In distributed authority contexts, this method is only invoked on the local client that has been assigned ownership of the associated <see cref="Netcode.NetworkObject"/>.
+        /// In distributed authority contexts, this method is invoked on all clients connected to the session.
         /// </summary>
         public virtual void OnGainedOwnership() { }
 
@@ -863,7 +863,7 @@ internal void InternalOnOwnershipChanged(ulong previous, ulong current)
         /// <summary>
         /// In client-server contexts, this method is invoked on the local client when it loses ownership of the associated <see cref="Netcode.NetworkObject"/>
         /// and on the server when any client loses ownership.
-        /// In distributed authority contexts, this method is only invoked on the local client that has lost ownership of the associated <see cref="Netcode.NetworkObject"/>.
+        /// In distributed authority contexts, this method is invoked on all clients connected to the session.
         /// </summary>
         public virtual void OnLostOwnership() { }