fix: Update self hoster image to 1.5.0

[BurnedMarshal]

List of Changes

set v1.5.0 as self_hosted_runner_image_tag default version

Motivation and Context

The current image starts but doesn't consume any work.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Chore (nothing changes by a user perspective)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.