nvim deprecation warning "WARNING vim.highlight is deprecated. Feature will be removed in Nvim 2.0.0"

[rajcspsg]

When I do :checkhealth deprecated, I get below waring -

• ⚠️WARNING vim.highlight is deprecated. Feature will be removed in Nvim 2.0.0
  • ADVICE:
    • use vim.hl instead.
    • stack traceback:
      /Users/myuser/.local/share/nvim/lazy/git-conflict.nvim/lua/git-conflict.lua:109
      =[C]:-1
      /Users/myuser/.config/nvim/lua/plugins/git-config/git-conflict.lua:5
      /Users/myuser/.local/share/nvim/lazy/lazy.nvim/lua/lazy/core/loader.lua:380
      =[C]:-1
      /Users/myuser/.local/share/nvim/lazy/lazy.nvim/lua/lazy/core/util.lua:135
      /Users/myuser/.local/share/nvim/lazy/lazy.nvim/lua/lazy/core/loader.lua:395
      /Users/myuser/.local/share/nvim/lazy/lazy.nvim/lua/lazy/core/loader.lua:362
      /Users/myuser/.local/share/nvim/lazy/lazy.nvim/lua/lazy/core/loader.lua:197
      /Users/myuser/.local/share/nvim/lazy/lazy.nvim/lua/lazy/core/loader.lua:127
      /Users/myuser/.local/share/nvim/lazy/lazy.nvim/lua/lazy/init.lua:112
      /Users/myuser/.config/nvim/init.lua:31

[samhed]

Same as #117. PR to fix it in #126