Clarify that rinja doesn't depend on askama but is a fork

README.md

@@ -1,10 +1,9 @@
 # rinja
 
-**Rinja** is based on [Askama](https://crates.io/crates/askama).
-It implements a template rendering engine based on [Jinja](https://jinja.palletsprojects.com/), and
-generates type-safe Rust code from your templates at compile time
+**Rinja** implements a template rendering engine based on [Jinja](https://jinja.palletsprojects.com/),
+and generates type-safe Rust code from your templates at compile time
 based on a user-defined `struct` to hold the template's context.
-See below for an example.
+See below for an example. It is a fork of [Askama](https://crates.io/crates/askama).
 
 All feedback welcome. Feel free to file bugs, requests for documentation and
 any other feedback to the [issue tracker][issues].