Change zed.service to zfs-zed.service in man page (fixed)

[Ornias1993]

Fixed style issues from #9563 by @gjedeer (that can be closed now).
Should comply to code-standards now.

zed.service does not exist
replaced with correct service name in man.

Signed-off-by: Kjeld Schouten-Lebbing kjeld@schouten-lebbing.nl

Motivation and Context

The manual advices to use "zed.service" this ends in an error according to #9563

# systemctl enable zed.service
Failed to enable unit: Refusing to operate on linked unit file zed.service

• New PR because previous author didn't want to follow the contribution guidelines.
• No legal issues as it's just changing 2 words in the in-application documentation + permission by original author, so no protected work has been violated by copying the changes in a new PR.

Description

This PR corrects the manual to list the correct service name

How Has This Been Tested?

It's changing a word in a manual. 'nuf said.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (a change to man pages or other documentation)

Checklist:

• My code follows the ZFS on Linux code style requirements.
• I have updated the documentation accordingly.
• I have read the contributing document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• All commit messages are properly formatted and contain Signed-off-by.

[Ornias1993]

@behlendorf This one solves your issues with #9563 , you might want to also add your approval tag here ;)
Failed test on this one seems onrelated.

[behlendorf]

Thanks for picking up this cleanup!