fix: update mason org and ruff LSP server name

- Replace williamboman/mason.nvim → mason-org/mason.nvim
- Replace williamboman/mason-lspconfig.nvim → mason-org/mason-lspconfig.nvim
  (mason moved to the mason-org GitHub organisation)
- Replace deprecated ruff_lsp server name with ruff in init.lua
  (ruff-lsp is deprecated; ruff now ships its own built-in LSP)

https://claude.ai/code/session_015n34EuHJuJjs9txfysJ5g9

init.lua

@@ -697,7 +697,7 @@ require('lazy').setup({
 
         -- Python
         basedpyright = {}, -- type checking
-        ruff_lsp = { -- linting + quickfixes
+        ruff = { -- linting + quickfixes
           on_attach = function(client)
             -- Let basedpyright handle hovers; ruff for diagnostics/code actions
             client.server_capabilities.hoverProvider = false

lua/kickstart/plugins/devstack.lua

@@ -1,10 +1,10 @@
 -- lua/kickstart/plugins/devstack.lua
 return {
   -- Mason core + LSP glue
-  { 'williamboman/mason.nvim', build = ':MasonUpdate', config = true },
+  { 'mason-org/mason.nvim', build = ':MasonUpdate', config = true },
   {
-    'williamboman/mason-lspconfig.nvim',
-    dependencies = { 'williamboman/mason.nvim' },
+    'mason-org/mason-lspconfig.nvim',
+    dependencies = { 'mason-org/mason.nvim' },
     opts = {
       ensure_installed = {
         -- LSP servers
@@ -19,7 +19,7 @@ return {
   {
     -- Auto-install external tools on first start
     'WhoIsSethDaniel/mason-tool-installer.nvim',
-    dependencies = { 'williamboman/mason.nvim' },
+    dependencies = { 'mason-org/mason.nvim' },
     opts = {
       ensure_installed = {
         -- Python