Update content/guides/api-calls/api-versioning-strategy.md

Co-authored-by: Barbara Czyż <bczyz@box.com>

content/guides/api-calls/api-versioning-strategy.md

@@ -40,7 +40,7 @@ Box API supports versioning in `header`. To determine which version to use, look
 ### Versioning in `header`
 
 Box API processes the `box-version` header which should contain a valid version name. For example when client wants
-to get list of all sign requests using version `2025.0`, the request should look like this:
+to get a list of all sign requests using version `2025.0`, the request should look like this:
 
 ```curl
 curl --location 'https://api.box.com/2.0/sign_requests' \