CI: bump docformatter version #385

Problem

Per Claude, some of our docformatter issues are endemic: "4. Switch to a maintained alternative
docformatter has been fairly stagnant. If Python 3.14 support matters to you, consider swapping to ruff (with --fix for docstring formatting) which is actively maintained and has no such issues."

Proposed solution

Remove the pin for python version 3.13 for docformatter 1.7.7 and bump this version to 1.7.8