Add recording 2025 September 'El cuervo'

Author: pmonfort

_meetups/2025-09-25-xmartlabs.md

@@ -10,6 +10,7 @@ talks:
      - guillermo_zorron
 
  - title: "Un tipo de Ruby"
+   recording: https://www.youtube.com/embed/x8I6lKexQWk?si=WDwCt0wVOBsuE8Pk
    speakers:
      - elcuervo
 ---