Pin ament-black to the released Python 3.14 / black>=26.3 fix (0.2.7, v0.0.12)

[doisyg]

Why

The ament_black hook is language: python, so pre-commit pip-installs ament-black into a venv built with the host Python. On Python 3.14 it fails: the dependency tracked the stale noble_fix branch of botsandus/ament_black, whose setup.py pins black==21.12b0 + uvloop==0.17.0 (no py3.14 wheels → install fails) and whose main.py still imports the removed black.concurrency.maybe_install_uvloop (black renamed it to maybe_use_uvloop in 26.3.0, psf/black#4996).

Change

botsandus/ament_black#18 is now merged and released as 0.2.7, which:

• adds a maybe_install_uvloop / maybe_use_uvloop import fallback, and
• unpins black/uvloop in setup.py (current black 26.x and uvloop 0.22.1 ship py3.14 wheels).

Pin the dependency to the released tag 0.2.7 (note: the tag has no v prefix) instead of the PR head commit.

Released as 0.0.12 — this is the first release of the fix (v0.0.12 was never tagged), so the repoint folds into that version rather than introducing a phantom 0.0.13.

Verified: an isolated venv install from the tag yields ament_black 0.2.7 and ament_black --reformat reformats correctly on Python 3.14 with black 26.5.1.

Note for consumers

Repos that pin this hook by rev: (e.g. auto-sandbox/.pre-commit-config.yaml) should bump to v0.0.12 once this is merged and tagged v0.0.12.