i18n: Even more casing in setup

Co-authored-by: Michael Geers <michael@geers.tv>

i18n/en/docusaurus-plugin-content-docs/current/guides/setup.mdx

@@ -208,7 +208,7 @@ If you have to pay tax on self-used energy, you can set the rate on your feed-in
 
 **Calculation of the solar energy share**
 
-If you get energy from more than one source at the same time (e.g 50% grid, 50% Solar), the algorithm will distribute the sources evenly across all configured Chargers.
+If you get energy from more than one source at the same time (e.g 50% grid, 50% solar), the algorithm will distribute the sources evenly across all configured Chargers.
 This assumes that your home consumption and your active Charge Points use an energy mix of 50/50.
 With this model, charging the car is treated exactly the same as using your washing machine.