Merge pull request #23 from aerfio/aerfio/improve-docs

Improve example CEL expression in documentation

README.md

@@ -79,7 +79,7 @@ spec:
  * `observed.composite.resource.spec.widgets == 42`
  * `observed.resources['bucket'].connection_details['user'] == b'admin'`
  * `desired.resources['bucket'].resource.spec.widgets == 42`
- * `has(desired.resources.bucket)`
+ * `"bucket" in desired.resources`
 
  Expressions must evaluate to `true` for the composed resource to be included.
 
@@ -90,4 +90,4 @@ spec:
 [cel]: https://github.com/google/cel-spec
 [filter]: https://en.wikipedia.org/wiki/Filter_(higher-order_function)
 [proto]: https://buf.build/crossplane/crossplane/docs/main:apiextensions.fn.proto.v1beta1#apiextensions.fn.proto.v1beta1.RunFunctionRequest
-[cel-intro]: https://github.com/google/cel-spec/blob/master/doc/intro.md
+[cel-intro]: https://github.com/google/cel-spec/blob/master/doc/intro.md