##### 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.
""" Action Plugins should implement this method to perform their
        tasks.  Everything else in this base class is a helper method for the
        action plugin to do that.
        :kwarg tmp: Deprecated parameter.  This is no longer used.  An action plugin that calls
            another one and wants to use the same remote tmp for both should set
            self._connection._shell.tmpdir rather than this parameter.
        :kwarg task_vars: The variables (host vars, group vars, config vars,
            etc) associated with this task.
        :returns: dictionary of results from the module
        Implementors of action modules may find the following variables especially useful:
        * Module parameters.  These are stored in self._task.args
        """
        result = {}
        if tmp is not None:
            result['warning'] = ['ActionModule.run() no longer honors the tmp parameter. Action'
                                 ' plugins should set self._connection._shell.tmpdir to share'
                                 ' the tmpdir']
        del tmp
        if self._task.async_val and not self._supports_async:
            raise AnsibleActionFail('async is not supported for this task.')
        elif self._play_context.check_mode and not self._supports_check_mode: