Update dynamic-prices.mdx (#617)

Better namechanges: Changed prices to tariffs

i18n/en/docusaurus-plugin-content-docs/current/features/dynamic-prices.mdx

@@ -13,7 +13,7 @@ If you have an electricity tariff with flexible electricity prices such as [Tibb
 
 The configuration of electricity prices currently still has to be done via `evcc.yaml`.
 
-### Fixed electricity price
+### Fixed electricity tariff
 
 Here is the configuration for a fixed electricity tariff.
 This information is used to calculate the actual charging costs.
@@ -26,10 +26,10 @@ tariffs:
  price: 0.32 # EUR/kWh
 ```
 
-### Time-dependent electricity price
+### Time-dependent electricity tariff
 
-Using `zones` you can specify different prices for certain periods of time.
-You can define as many periods as you like in which a different price applies.
+Using `zones` you can specify different tariffs for certain periods of time.
+You can define as many periods as you like in which a different tariff applies.
 
 ```yaml
 tariffs:
@@ -45,9 +45,9 @@ tariffs:
  price: 0.12 # EUR/kWh (weekend)
 ```
 
-### Dynamic electricity price via API
+### Dynamic electricity tariff via API
 
-If you have an electricity tariff that follows electricity exchange prices, for example, you can also obtain the prices via an API.
+If you have an electricity tariff that follows electricity exchange tariff, for example, you can also obtain the prices via an API.
 Here is an example configuration for the electricity tariff from [Tibber](https://tibber.com/de/).
 
 ```yaml
@@ -80,7 +80,7 @@ This limit applies in **solar mode** of the current charging point.
 If you click on "apply everywhere", the limit is applied to all charging points.
 In addition to [Solar Surplus Charging](./solar-charging), fast charging is now activated in the hours with low electricity prices (green bars).
 
-## Charging planning
+## Charging plan
 
 By using [charging plans](./plans) you can regulate your energy costs even more precisely.
 All you have to do is enter your energy quantity (kWh) or your target charge level (%) and the desired departure time.