Fix sudo commands in update guides

doc/update/5.1-to-5.2.md

@@ -7,7 +7,7 @@ It's useful to make a backup just in case things go south:
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:create
+sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production
 ```
 
 ### 1. Stop server
@@ -95,5 +95,5 @@ Follow the [`upgrade guide from 5.0 to 5.1`](5.0-to-5.1.md), except for the data
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:restore
+sudo -u git -H bundle exec rake gitlab:backup:restore RAILS_ENV=production
 ```

doc/update/5.2-to-5.3.md

@@ -7,7 +7,7 @@ It's useful to make a backup just in case things go south:
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:create
+sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production
 ```
 
 ### 1. Stop server
@@ -78,5 +78,5 @@ Follow the [`upgrade guide from 5.1 to 5.2`](5.1-to-5.2.md), except for the data
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:restore
+sudo -u git -H bundle exec rake gitlab:backup:restore RAILS_ENV=production
 ```

doc/update/5.3-to-5.4.md

@@ -7,7 +7,7 @@ It's useful to make a backup just in case things go south:
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:create
+sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production
 ```
 
 ### 1. Stop server
@@ -86,5 +86,5 @@ Follow the [`upgrade guide from 5.2 to 5.3`](5.2-to-5.3.md), except for the data
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:restore
+sudo -u git -H bundle exec rake gitlab:backup:restore RAILS_ENV=production
 ```

doc/update/5.4-to-6.0.md

@@ -24,7 +24,7 @@ It's useful to make a backup just in case things go south:
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:create
+sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production
 ```
 
 ### 1. Stop server

doc/update/6.0-to-6.1.md

@@ -16,7 +16,7 @@ It's useful to make a backup just in case things go south:
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:create
+sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production
 ```
 
 ### 1. Stop server
@@ -99,5 +99,5 @@ Follow the [`upgrade guide from 5.4 to 6.0`](5.4-to-6.0.md), except for the data
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:restore
+sudo -u git -H bundle exec rake gitlab:backup:restore RAILS_ENV=production
 ```

doc/update/6.1-to-6.2.md

@@ -9,7 +9,7 @@ It's useful to make a backup just in case things go south:
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:create
+sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production
 ```
 
 ### 1. Stop server
@@ -96,5 +96,5 @@ Follow the [`upgrade guide from 6.0 to 6.1`](6.0-to-6.1.md), except for the data
 
 ```bash
 cd /home/git/gitlab
-sudo -u git -H RAILS_ENV=production bundle exec rake gitlab:backup:restore
+sudo -u git -H bundle exec rake gitlab:backup:restore RAILS_ENV=production
 ```