Only documents of type /recipe should be taken into account when generating the list of recipes.

See
https://github.com/quarkusio/quarkus-updates/blob/db61f918fce71751a50a9f69a98a451ebadf07df/recipes/src/main/resources/quarkus-updates/org.apache.camel.quarkus/camel-quarkus/3alpha.yaml#L27-L32 for an example of the problem.

FWIW, this problem would lead to these non-fatal errors:

> [INFO] — rewrite-maven-plugin:5.25.0:run (default-cli) @ quarkus-bot —
> [INFO] Using active recipe(s) [io.quarkus.openrewrite.Quarkus]
> [INFO] Using active styles(s) []
> [INFO] Validating active recipes...
> [ERROR] Recipe validation error in io.quarkus.openrewrite.Quarkus.recipeList[88] (in file:/tmp/quarkus-project-recipe-14501541571856957500.yaml): recipe 'Camel 3.x' does not exist.
> [ERROR] Recipe validation error in io.quarkus.openrewrite.Quarkus.recipeList[88] (in file:/tmp/quarkus-project-recipe-14501541571856957500.yaml): recipe 'Camel 3.x' does not exist.
> [ERROR] Recipe validation error in io.quarkus.openrewrite.Quarkus.recipeList[88] (in file:/tmp/quarkus-project-recipe-14501541571856957500.yaml): recipe 'Camel 3.x' does not exist.