chore: properly update plugin version

- manually update version to 0.1.0 since the github action won't do it rn

Author: BPR02

beet_observer/__init__.py

@@ -1,3 +1,3 @@
-__version__ = "0.0.1"
+__version__ = "0.1.0"
 
 from .plugin import *

pyproject.toml

@@ -20,7 +20,7 @@ twine = "^5.1.1"
 
 [tool.semantic_release]
 branch = "main"
-version_variable = ["beet_observer/__init__.py:__version__"]
+version_variables = ["beet_observer/__init__.py:__version__"]
 version_toml = ["pyproject.toml:tool.poetry.version"]
 major_on_zero = true
 build_command = "poetry build"