Update InMemoryTransport link to pinned lines

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: halter73

docs/concepts/sessions/sessions.md

@@ -335,7 +335,7 @@ The stdio transport creates a single server for the lifetime of the process. The
 
 #### McpServer.Create (custom transports)
 
-When you create a server directly with <xref:ModelContextProtocol.Server.McpServer.Create*>, you control the `IServiceProvider` and transport yourself. If you pass an already-scoped provider, you can set <xref:ModelContextProtocol.Server.McpServerOptions.ScopeRequests> to `false` to avoid creating redundant nested scopes. The [InMemoryTransport sample](https://github.com/modelcontextprotocol/csharp-sdk/tree/main/samples/InMemoryTransport) shows a minimal example of using `McpServer.Create` with in-memory pipes:
+When you create a server directly with <xref:ModelContextProtocol.Server.McpServer.Create*>, you control the `IServiceProvider` and transport yourself. If you pass an already-scoped provider, you can set <xref:ModelContextProtocol.Server.McpServerOptions.ScopeRequests> to `false` to avoid creating redundant nested scopes. The [InMemoryTransport sample](https://github.com/modelcontextprotocol/csharp-sdk/blob/51a4fde4d9cfa12ef9430deef7daeaac36625be8/samples/InMemoryTransport/Program.cs#L6-L14) shows a minimal example of using `McpServer.Create` with in-memory pipes:
 
 ```csharp
 Pipe clientToServerPipe = new(), serverToClientPipe = new();