feat: update action.yml with new flags and descriptions

- Update the `description` of `--overwrite` flag in `action.yml`
- Add a new input `tar_dereference` with `--dereference` flag in `action.yml`

Signed-off-by: Bo-Yi.Wu <appleboy.tw@gmail.com>

action.yml

@@ -42,7 +42,10 @@ inputs:
     description: 'remove the specified number of leading path elements'
     default: 0
   overwrite:
-    description: 'use `--overwrite` flag with tar'
+    description: 'use --overwrite flag with tar'
+    default: false
+  tar_dereference:
+    description: 'use --dereference flag with tar'
     default: false
   tar_tmp_path:
     description: 'temporary path for tar file on the dest host'