Add -H to sudo commands in 4.1-to-4.2.md

doc/update/4.1-to-4.2.md

@@ -12,15 +12,15 @@
 cd /home/gitlab/gitlab/
 
 # Get latest code
-sudo -u gitlab git fetch
+sudo -u gitlab -H git fetch
 
-sudo -u gitlab git checkout 4-2-stable
+sudo -u gitlab -H git checkout 4-2-stable
 
 # Install libs
-sudo -u gitlab bundle install --without development test postgres --deployment
+sudo -u gitlab -H bundle install --without development test postgres --deployment
 
 # update db
-sudo -u gitlab bundle exec rake db:migrate RAILS_ENV=production
+sudo -u gitlab -H bundle exec rake db:migrate RAILS_ENV=production
 
 ```