[NEW CHECK] README shoudl contain to CHANGELOG_OLD.md

[mcm1957]

I'm sure that

• This issue does not report a false-positive detection (use dedicated template for this)
• This issue does not request a change or removal of existing check (use dedicated template for this)
• There is no other (open) issue with the same topic (use the search!)

Description of check to be added

If repository uses a CHANGELOG:OLD.md file the README.md should link to it

Link to repository

n/a

Checker version

5.1.0