Update website/docs/chapter-02/05_keyword_interface.md

Co-authored-by: Aleksi Simell <[email protected]>

Author: Snooz82

website/docs/chapter-02/05_keyword_interface.md

@@ -125,7 +125,7 @@ Another important information is if an argument is mandatory or optional.
 See the next two sections for more information about these two kinds of arguments.
 
 The most arguments can either be set by their position or by their name.
-But there some kind of keywords that can only be set positional, like **Variable Number of Positional Arguments**, or only be set named, like **Named-Only Arguments** or **Free Named Arguments**.
+But there are some kinds of arguments that can only be set positional, like **Variable Number of Positional Arguments**, or only be set named, like **Named-Only Arguments** or **Free Named Arguments**.
 
 The order is as follows:
 1. **Positional or Named Arguments** (can be mandatory or optional)