Merge pull request #9791 from konpyu/fix-deprecated

Fix deprecated `prepend_before_filter` -> `prepend_before_action`

app/controllers/projects_controller.rb

 class ProjectsController < ApplicationController
   include ExtractsPath
-  prepend_before_filter :render_go_import, only: [:show]
+  prepend_before_action :render_go_import, only: [:show]
   skip_before_action :authenticate_user!, only: [:show, :activity]
   before_action :project, except: [:new, :create]
   before_action :repository, except: [:new, :create]