ci: lock the fishtape test dependency to v1

[matchai]

Description

Fishtape v2 was released today, which breaks our tests. Until we migrate to using fishtape v2, we'll keep the release of fishtape locked to the last commit of fishtape v1.

Types of changes

• [x] 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)

Screenshots (if appropriate):

How Has This Been Tested?

• [x] I have tested using MacOS
• [ ] I have tested using Linux

Checklist:

• [x] I have checked that no other PR duplicates mine
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have updated the tests accordingly.

[matchai]

:tada: This PR is included in version 2.2.1 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: