Remove an extra whitespace in test files

Partial CE backport of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/10565Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

spec/factories/ci/bridge.rb

 FactoryBot.define do
   factory :ci_bridge, class: Ci::Bridge do
-    name ' bridge'
+    name 'bridge'
     stage 'test'
     stage_idx 0
     ref 'master'