Fix pyproject.toml version (was missed in 0.1.9 + 0.1.10 bumps)

The previous two version bumps (0.1.9 in commit cd09c8c, 0.1.10 in
commit ff36a9e) updated setup.py but failed to update pyproject.toml,
leaving it at 0.1.8. The PyPI publish workflow uses pyproject.toml for
the [project].version, so the workflow tried to republish 0.1.8 (already
on PyPI, immutable) and failed.

Bringing pyproject.toml into line at 0.1.10 (matching the current
setup.py) so the next workflow run publishes the actual fix content.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dcj

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "ebus-sdk"
-version = "0.1.8"
+version = "0.1.10"
 description = "Python SDK for Homie MQTT Convention (eBus)"
 readme = "README.md"
 requires-python = ">=3.10"