docs: use importlib.metadata for version resolution (#1446)

Signed-off-by: Joshie <74162303+CoderJoshDK@users.noreply.github.com>
Co-authored-by: Zenith <me@arielle.codes>

Author: CoderJoshDK

changelog/1446.doc.rst

@@ -0,0 +1 @@
+Update version resolution in ``docs/conf.py`` to use :py:class:`importlib.metadata` instead of regex.

docs/conf.py

@@ -12,6 +12,7 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
+import importlib.metadata
 import importlib.util
 import inspect
 import os
@@ -106,15 +107,11 @@
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
-# The short X.Y version.
-
-version = ""
-with open("../disnake/__init__.py") as f:
-    version = re.search(r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]', f.read(), re.MULTILINE).group(1)  # pyright: ignore[reportOptionalMemberAccess]
-
 # The full version, including alpha/beta/rc tags.
-release = version
+release = importlib.metadata.version("disnake")
 
+# The short X.Y version.
+version = ".".join(release.split(".")[:2])
 
 _IS_READTHEDOCS = bool(os.getenv("READTHEDOCS"))