build: go 1.24

We were running behind and there were quite some deprecations to update.
This was mostly in the upstream copy/pasta package but seems quite
minimal.

vendor/golang.org/x/crypto/ssh/tcpip.go

@@ -459,7 +459,7 @@ func (c *Client) dial(laddr string, lport int, raddr string, rport int) (Channel
 		return nil, err
 	}
 	go DiscardRequests(in)
-	return ch, err
+	return ch, nil
 }
 
 type tcpChan struct {