fix: Fixed typo in readme.md

Author: Alfred Brockotter

README.md

@@ -46,7 +46,7 @@ npm i rxjs --save (because this is a peer dependency of the Kentico Cloud Delive
 By default Nuxt can only work with promises. Therefor you always use the "getPromise" method provided by the Kentico Cloud Delivery SDK! RxJs operator's are not supported at the moment.
 
 ## Caching
-API calls can be "cached" (they will be stored in memory) client side via the "viaCache" method
+API calls can be "cached" (they will be stored in memory) client side via the "viaCache" method.
 
 ```javascript
  const query =  this.$deliveryClient.items().type('page');