##### SUMMARY
The warning that `become` show, point to a non-existing page.

The reference: https://docs.ansible.com/ansible/become.html#becoming-an-unprivileged-user
Should be: https://docs.ansible.com/ansible/user_guide/become.html#risks-of-becoming-an-unprivileged-user

```
  msg: |-
    Failed to set permissions on the temporary files Ansible needs to create when becoming an unprivileged user (rc: 1, err: chown: changing ownership of '/var/tmp/ansible-tmp-1587201990.1515293-106086999273646/': Operation not permitted
    chown: changing ownership of '/var/tmp/ansible-tmp-1587201990.1515293-106086999273646/AnsiballZ_postgresql_db.py': Operation not permitted
    }). For information on working around this, see https://docs.ansible.com/ansible/become.html#becoming-an-unprivileged-user
```

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
become

##### ANSIBLE VERSION
```
ansible 2.9.6
  config file = None
  configured module search path = ['/home/robertdb/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python3.7/site-packages/ansible
  executable location = /usr/local/bin/ansible
  python version = 3.7.6 (default, Jan 30 2020, 09:44:41) [GCC 9.2.1 20190827 (Red Hat 9.2.1-1)]
```

##### CONFIGURATION
```
# empty.
```

##### OS / ENVIRONMENT
Controller: Fedora 31
Managed node: Ubuntu 19

##### STEPS TO REPRODUCE
I use [this](https://github.com/robertdebock/ansible-role-postgres/blob/master/tasks/main.yml#L70) role on Ubuntu 19. (Using [this](https://github.com/robertdebock/ansible-tester) code.

##### EXPECTED RESULTS
The chapter is found immediately.

##### ACTUAL RESULTS
The documentation page loads (good), but does not jump to the right chapter.
if tmp is not None:
            display.warning('_execute_remote_stat no longer honors the tmp parameter. Action'
                            ' plugins should set self._connection._shell.tmpdir to share'
                            ' the tmpdir')
        del tmp  
        module_args = dict(
            path=path,
            follow=follow,
            get_checksum=checksum,
            checksum_algorithm='sha1',
        )
        mystat = self._execute_module(module_name='stat', module_args=module_args, task_vars=all_vars,
                                      wrap_async=False)
        if mystat.get('failed'):
            msg = mystat.get('module_stderr')
            if not msg:
                msg = mystat.get('module_stdout')
            if not msg:
                msg = mystat.get('msg')
            raise AnsibleError('Failed to get information on remote file (%s): %s' % (path, msg))
        if not mystat['stat']['exists']:
            
            mystat['stat']['checksum'] = '1'
        
        if 'checksum' not in mystat['stat']:
            mystat['stat']['checksum'] = ''
        elif not isinstance(mystat['stat']['checksum'], string_types):
            raise AnsibleError("Invalid checksum returned by stat: expected a string type but got %s" % type(mystat['stat']['checksum']))
        return mystat['stat']
    def _remote_checksum(self, path, all_vars, follow=False):