Update - Only consider recipes when generating the list of recipes

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.

(cherry picked from commit ffb371e)

independent-projects/tools/devtools-common/src/main/java/io/quarkus/devtools/project/update/rewrite/QuarkusUpdateRecipe.java

@@ -51,6 +51,10 @@ public QuarkusUpdateRecipe addRecipe(Map<String, Object> recipe) {
         if (!recipe.containsKey("name") || !(recipe.get("name") instanceof String)) {
             throw new IllegalArgumentException("Recipe name is required");
         }
+        // some YAML documents might not be recipes. For instance, they could be categories.
+        if (!recipe.containsKey("type") || !recipe.get("type").toString().endsWith("/recipe")) {
+            return this;
+        }
         this.recipes.add(recipe);
         return this;
     }