feat: Use <C-l> to refresh directory (#7)

lua/oil/config.lua

@@ -34,6 +34,7 @@ local default_config = {
     ["<C-h>"] = "actions.select_split",
     ["<C-p>"] = "actions.preview",
     ["<C-c>"] = "actions.close",
+    ["<C-l>"] = "actions.refresh",
     ["-"] = "actions.parent",
     ["_"] = "actions.open_cwd",
     ["`"] = "actions.cd",