[#24594] Fix typo in workflow step name

[Danipiza]

Description

Fix a typo in the workflow step name:

• Install Fix Python version -> Install Fixed Python version

Contributor Checklist

• Commit messages follow the project guidelines.
• The added tests pass locally.
• Changes are backwards compatible.
• New feature has been documented/Current behavior is correctly described in the documentation.
• Applicable backports have been included in the description.

Reviewer Checklist

• The PR has a milestone assigned.
• The title and description correctly express the PR's purpose.
• Check contributor checklist is correct.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.