python314: fix pythonAttr value (#446723)

Changed files
+1 -1
pkgs
top-level
+1 -1
pkgs/top-level/all-packages.nix
···
};
python314FreeThreading = python314.override {
self = python314FreeThreading;
-
pythonAttr = "python313FreeThreading";
+
pythonAttr = "python314FreeThreading";
enableGIL = false;
};