vimPlugins.lazy-nvim: Fix lazy.nvim try to write helptags on readonly fs

E5108: Error executing lua: .../pack/myNeovimPackages/start/lazy.nvim/lua/lazy/help.lua:42: Vim:E152: Cannot open /nix/store/...-vim-pack-dir/pack/myNeovimPackages/start/lazy.nvim/doc/tags for writing

pkgs/applications/editors/vim/plugins/overrides.nix

@@ -642,6 +642,10 @@ self: super: {
     dependencies = with self; [ nvim-lspconfig ];
   });
 
+  lazy-nvim = super.lazy-nvim.overrideAttrs (old: {
+    patches = [ ./patches/lazy-nvim/no-helptags.patch ];
+  });
+
   lean-nvim = super.lean-nvim.overrideAttrs (old: {
     dependencies = with self; [ nvim-lspconfig plenary-nvim ];
   });

pkgs/applications/editors/vim/plugins/patches/lazy-nvim/no-helptags.patch

@@ -0,0 +1,14 @@
+diff --git a/lua/lazy/help.lua b/lua/lazy/help.lua
+index 4a289eb..5ddc168 100644
+--- a/lua/lazy/help.lua
++++ b/lua/lazy/help.lua
+@@ -38,9 +38,6 @@ function M.index(plugin)
+ end
+ 
+ function M.update()
+-  if Config.plugins["lazy.nvim"] then
+-    vim.cmd.helptags(Config.plugins["lazy.nvim"].dir .. "/doc")
+-  end
+   if Config.options.readme.enabled == false then
+     return
+   end