treewide: fix a lot of broken / dead links

modules/wrapper/environment/options.nix

@@ -47,7 +47,7 @@ in {
         internally to add plugins to Neovim's runtime.
 
         To add additional plugins to your configuration, consider
-        using the [{option}`vim.extraPlugins`](#opt-vim.extraPlugins)
+        using the {option}`vim.extraPlugins`
         option.
       '';
     };

modules/wrapper/rc/options.nix

@@ -284,7 +284,7 @@ in {
       default = "";
       defaultText = literalMD ''
         By default, this option will **append** paths in
-        {option}`vim.additionalRuntimePaths`
+        {option}`vim-additionalRuntimePaths`
         to the `runtimepath` and enable the experimental Lua module loader
         if {option}`vim.enableLuaLoader` is set to true.
       '';