fix mysql service name typo

[D3vil0p3r]

Describe your changes

The MySQL service name is not mysql anymore but mysqld.

Issue ticket number and link (if there is one)

Checklist before requesting a review

• I have performed a self-review of my code
• If it is a core feature, I have added thorough tests.
• I have added an entry to CHANGELOG.md
• I have updated the documentation in docs/ (if applicable)

[D3vil0p3r]

@vinnybod can you give a look to this simple PR?

[vinnybod]

I couldn't find much info about whether to use mysql or mysqld, but I know the current behavior works for the OS that we test.

Do we need to add a check here like:

if systemctl list-units --type=service | grep -i mysqld > /dev/null; then
    sudo systemctl start mysqld
else
    sudo systemctl start mysql
fi

[D3vil0p3r]

I further verified. Your current code with mysql is right. I close this PR.