Update the drush version to latest release

[EHLOVader]

This bumps the version of Drush used by the plugin to the latest 8.5.0 and fixes issue #253

This is a minor change so I'm unsure of how many of the correct contributor steps are required. But kept the information below to follow up if needed.

Fixes #253

Bare minimum self-checks

What do you think of a person who only does the bare minimum?

• I've updated this PR with the latest code from main
• I've done a cursory QA pass of my code locally
• I've ensured all automated status check and tests pass
• I've connected this PR to an issue

Pieces of flare

• I've written a unit or functional test for my code
• I've updated relevant documentation it my code changes it
• I've updated this repo's README if my code changes it
• I've updated this repo's CHANGELOG with my change unless its a trivial change (like updating a typo in the docs)

Finally

• I've requested a review with relevant people

If you have any issues or need help please join the #contributors channel in the Lando slack and someone will gladly help you out!

You can also check out the coder guide.

[netlify]

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🔨 Latest commit	f0f89fc

[EHLOVader]

This could be improved by reaching out for the latest version, but I'm unsure how to best do that.
This is the closest I've been able to get and it uses git cli, but should be stable.

 git ls-remote --tags [email protected]:drush-ops/drush.git "8.*" | tail -n1 | awk -F'/' '{print $NF}'

Returns

8.5.0