Bump version to 4.1-stable \o/

Around 1500 commits from 300+ contributors merged over 4 months.

The new 4.x release cycle with 3 months of development and 1 month of
bugfixing proved to work fairly well for this 4.1 release, and we will
keep refining it for future releases.

The faster-paced release cycle means that each minor 4.x release will
have a small scope and won't be as impressive as the massive 4.0 was,
but it means that users get access to the new features and bug fixes
faster, and the stabilization phase is also significantly shortened
(only one month of feature freeze, so contributors don't need to wait
long to see their approved feature PRs merged for the next milestone).

Onwards to 4.2!

version.py

@@ -3,8 +3,8 @@
 major = 4
 minor = 1
 patch = 0
-status = "rc"
+status = "stable"
 module_config = ""
 year = 2023
 website = "https://godotengine.org"
-docs = "latest"
+docs = "4.1"