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Update broken link for Shelly EM (#39931)

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source/_includes/energy/ct_clamp.md
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Current transformer (CT) clamp sensors measure your energy usage by looking at the current passing through an electrical wire. This makes it possible to calculate the energy usage. In Home Assistant we have support for off-the-shelf CT clamp sensors or you can build your own.
- The off-the-shelf solution that we advise is the [Shelly EM](https://www.shelly.com/en/products/shop/shelly-em-120a/shelly-em-50a?tracking=A7FsiPIfUWsFpnfKHa8SRyUYLXjr2hPq). The device has a local API, updates are pushed to Home Assistant and it has a high quality [integration](/integrations/shelly/).
- The off-the-shelf solution that we advise is the [Shelly EM](https://www.shelly.com/products/shelly-em-50a-clamp-1?tracking=A7FsiPIfUWsFpnfKHa8SRyUYLXjr2hPq). The device has a local API, updates are pushed to Home Assistant and it has a high quality [integration](/integrations/shelly/).
- You can build your own using ESPHome's [CT Clamp Current sensor](https://esphome.io/components/sensor/ct_clamp.html) or energy meter sensors like the [ATM90E32](https://esphome.io/components/sensor/atm90e32.html). For the DIY route, check out [this video by digiblur](https://www.youtube.com/watch?v=n2XZzciz0s4) to get started.
- Using a Raspberry Pi, you can use a CT clamp HAT from LeChacal called [RPICT hats](https://lechacal.com/docs/RPICT/Raspberrypi_Current_and_Temperature_Sensor_Adaptor/). They can be stacked to expand the number of lines to monitor. They also provide Active, Apparent, and Reactive power and power factor for single-phase and three-phase installations. They integrate with Home Assistant using MQTT.