nvim: Reset gopls diagnostic trigger to its default

go.nvim sets the trigger to 'Save' by default due to some seemingly
broken logic[1]. This prevents diagnostics from being refreshed on
InsertLeave as intended by Neovim (:h vim.diagnostic.Opts).

[1]: ray-x/go.nvim#515

nvim/init.lua

@@ -496,7 +496,9 @@ require "lazy".setup({
               compositeLiteralFields = true,
               constantValues = true,
               functionTypeParameters = true
-            }
+            },
+            diagnosticsDelay = "1s",
+            diagnosticsTrigger = "Edit"
           }
         }
       },