Bump version to 4.4-stable \o/

Another massive release with close to 3000 commits (excluding merge commits),
with a big focus on improvements to the overall workflow and usability of the
editor.

Engine features didn't want to be left out amidst this usability focus though,
and this release is absolutely feature-packed in all areas.

See the release page for details: https://godotengine.org/releases/4.4/

More than 500 contributors were involved in this new feature release,
and we want to thank them all for their amazing contributors, as well
as all users who sponsor the Development Fund, reported bugs, opened
proposals, or supported each other on our community platforms.

version.py

@@ -3,7 +3,7 @@
 major = 4
 minor = 4
 patch = 0
-status = "rc"
+status = "stable"
 module_config = ""
 website = "https://godotengine.org"
-docs = "latest"
+docs = "4.4"