Fetch version from importlib metadata during sphinx build

docs/source/conf.py

@@ -2,6 +2,7 @@
 # alot documentation build configuration file
 import pathlib
 import tomllib
+import importlib.metadata
 
 pyproject = pathlib.Path(__file__).parent.parent.parent / "pyproject.toml"
 with pyproject.open("rb") as f:
@@ -54,9 +55,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = project_data["version"]
+version = importlib.metadata.version("alot")
 # The full version, including alpha/beta/rc tags.
-release = project_data["version"]
+release = importlib.metadata.version("alot")
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.