Change the hlslens theme

- Stop highlighting being so bright to differentiate it from regular text
diff --git a/modules/neovim/theme/default.nix b/modules/neovim/theme/default.nix
index 168e464..a088f9e 100644
--- a/modules/neovim/theme/default.nix
+++ b/modules/neovim/theme/default.nix
@@ -1,8 +1,10 @@
 {pkgs, ...}: {
   programs.neovim = {
     plugins = with pkgs.vimPlugins; [onehalf nvim-hlslens pkgs.nvim-scrollbar];
-    extraConfig = builtins.readFile ./theme.vim + ''
-      source ${./scrollbar.lua}
-    '';
+    extraConfig =
+      builtins.readFile ./theme.vim
+      + ''
+        source ${./scrollbar.lua}
+      '';
   };
 }