Replace factory_girl_rails with factory_bot_railsrc/use-factory_bot_rails

I've followed the [upgrade guide](https://github.com/thoughtbot/factory_bot/blob/4-9-0-stable/UPGRADE_FROM_FACTORY_GIRL.md) and ran these two commands:

```
grep -e FactoryGirl **/*.rake **/*.rb -s -l | xargs sed -i "" "s|FactoryGirl|FactoryBot|"
grep -e factory_girl **/*.rake **/*.rb -s -l | xargs sed -i "" "s|factory_girl|factory_bot|"
```

Signed-off-by: Rémy Coutable <remy@rymai.me>

1 files changed, 1 insertions, 1 deletions

diff --git a/spec/factories/labels.rb b/spec/factories/labels.rb
index 416317d677b..f759b6d499d 100644
--- a/spec/factories/labels.rb
+++ b/spec/factories/labels.rb
@@ -1,4 +1,4 @@
-FactoryGirl.define do
+FactoryBot.define do
   trait :base_label do
     title { generate(:label_title) }
     color "#990000"