fix: the floor on PyYAML is 6.0.1 (NAPALM/driver-standard#6)

PyYAML 6.0 ships no Python 3.12 wheel and fails to build from source
there, so the lowest job could not install it.

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   on 3.12, so 3.10 and 3.11 are no longer tested (NAPALM/driver-standard#6).
 - The floor on napalm is 5.1: older releases import `pkg_resources`, which a Python
   3.12 venv no longer has.
+- The floor on PyYAML is 6.0.1: 6.0 has no Python 3.12 wheel and does not build there.
 
 ## [0.3.0] - 2026-10-23
 

pyproject.toml

@@ -32,7 +32,7 @@ dependencies = [
     # Provisioning: download the image, write the NoCloud seed ISO and its YAML.
     "requests>=2.31",
     "pycdlib>=1.14",
-    "PyYAML>=6.0",
+    "PyYAML>=6.0.1",  # 6.0 has no Python 3.12 wheel and does not build there
 ]
 
 [project.optional-dependencies]