nvim: init: Fix option settings

Some options need to be set for both vim.bo (for the current buffer) and
vim.o (for newly opened buffers). This is required till the below PR
gets merged.
https://github.com/neovim/neovim/pull/13479

nvim/.config/nvim/init.lua

@@ -44,6 +44,7 @@ vim.o.sessionoptions = 'buffers,curdir,tabpages,winsize'
 vim.o.shada          = ''
 vim.o.diffopt        = 'filler,internal,algorithm:histogram,indent-heuristic'
 vim.o.scrolloff      = 999
+vim.o.swapfile       = false
 vim.bo.swapfile      = false
 vim.bo.formatoptions = "crqn1j"