DEV: Fix flaky test due to a lack of deterministic ordering (#20087)

app/controllers/tags_controller.rb

@@ -63,10 +63,13 @@ class TagsController < ::ApplicationController
       unrestricted_tags = DiscourseTagging.filter_visible(tags.where(target_tag_id: nil), guardian)
 
       categories =
-        Category.where(
+        Category
+          .where(
             "id IN (SELECT category_id FROM category_tags WHERE category_id IN (?))",
             guardian.allowed_category_ids,
-        ).includes(:none_synonym_tags)
+          )
+          .includes(:none_synonym_tags)
+          .order(:id)
 
       category_tag_counts =
         categories

spec/requests/tags_controller_spec.rb

@@ -197,7 +197,7 @@ RSpec.describe TagsController do
         expect(categories[0]["tags"][0]["target_tag"]).to eq(nil)
       end
 
-      xit "does not result in N+1 queries when there are multiple categories configured with tags for an admin user" do
+      it "does not result in N+1 queries when there are multiple categories configured with tags for an admin user" do
         category.update!(tags: [test_tag])
 
         sign_in(admin)