Tweak README wording about the query language
EdgeQL is great, but it's definitely not formally defined (yet!?).
@@ -142,7 +142,7 @@ picture.
While EdgeDB solves the same problems as ORM libraries, it's so much more. It's
a full-fledged database with a
-[formally-defined query language](https://www.edgedb.com/docs/edgeql/index), a
+[powerful and elegant query language](https://www.edgedb.com/docs/edgeql/index), a
[migrations system](https://www.edgedb.com/docs/guides/migrations/index), a
[suite of client libraries](https://www.edgedb.com/docs/clients/index) in
different languages, a
