Fix Replace button form path

Changelog: fixed

app/presenters/blob_presenter.rb

@@ -56,7 +56,7 @@ class BlobPresenter < Gitlab::View::Presenter::Delegated
   end
 
   def replace_path
-    url_helpers.project_create_blob_path(project, ref_qualified_path)
+    url_helpers.project_update_blob_path(project, ref_qualified_path)
   end
 
   def pipeline_editor_path

spec/presenters/blob_presenter_spec.rb

@@ -28,7 +28,7 @@ RSpec.describe BlobPresenter do
   end
 
   describe '#replace_path' do
-    it { expect(presenter.replace_path).to eq("/#{project.full_path}/-/create/#{blob.commit_id}/#{blob.path}") }
+    it { expect(presenter.replace_path).to eq("/#{project.full_path}/-/update/#{blob.commit_id}/#{blob.path}") }
   end
 
   describe '#can_current_user_push_to_branch' do