upgrade actions/core to version 3v4.0.3v4

The relevant changes are in clean.js/restore.js. I'm very, very far away
from the entire Javascript infrastructure, and absolutely don't
understand why this changes were necessary. Thanks, ChatGPT! Supposedly,
this has something to do with the actions/core's transition to ESM or
whatever.

1 files changed, 3 insertions, 3 deletions

diff --git a/restore.js b/restore.js
index 794f6a5..997dad0 100644
--- a/restore.js
+++ b/restore.js
@@ -1,7 +1,7 @@
-const os = require('os');
-const process = require('process');
+import * as os from 'os';
+import * as process from 'process';
 
-const core = require('@actions/core');
+import * as core from '@actions/core';
 
 try {
     if (os.platform != 'win32') {