chore: Python 3.12 is the floor, part B (#6)

check now requires requires-python >= 3.12. Every standard driver moved
to that floor in its own PR, so none of them goes red with this.

STANDARDS.md

@@ -178,7 +178,7 @@ release tags:
 - **`py.typed`** ships with the package.
 
 `napalm-standard check` verifies: LICENSE, README and CHANGELOG present; the
-metadata fields; `requires-python` ≥ 3.10; a floor on `napalm-device-types`; a
+metadata fields; `requires-python` ≥ 3.12; a floor on `napalm-device-types`; a
 `napalm.drivers` entry point; URLs in the org; `py.typed`; CI in `.gitea/` and no
 `.github/`; strict mypy, a coverage source and floor; on a tag, tag = version and a
 CHANGELOG section for it.