Change "Low-carbon energy consumed" to "… electricity …" (#23096)

The Energy card allows the user to monitor the "Grid carbon footprint" which is visualized by the "Low-carbon energy consumed" gauge.

But this does not cover the carbon emissions of the gas consumption that might be shown right next to it, just the electrical energy from the grid.

So the labeling is very misleading in that context – not even considering energy consumed by oil or wood burned in addition.

Therefore this needs to be changed to use "electricity" just like the description already does.

src/translations/en.json

@@ -5717,8 +5717,8 @@
             },
             "carbon_consumed_gauge": {
               "card_indicates_energy_used": "This card indicates how much of the electricity consumed by your home was generated using non-fossil fuels like solar, wind, and nuclear. The higher, the better!",
-              "low_carbon_energy_consumed": "Low-carbon energy consumed",
-              "low_carbon_energy_not_calculated": "Consumed low-carbon energy couldn't be calculated"
+              "low_carbon_energy_consumed": "Low-carbon electricity consumed",
+              "low_carbon_energy_not_calculated": "Consumed low-carbon electricity couldn't be calculated"
             }
           },
           "heading": {