ci: Bump @actions/artifact from 1x to 2.x (#13503)

v1 of this is deprecated, which you can see in each CI run on develop as
of now. Updating this should fix the deprecation.

This _should_ not break stuff for us:
https://www.npmjs.com/package/@actions/artifact#v2---whats-new

dev-packages/size-limit-gh-action/index.mjs

@@ -2,7 +2,7 @@ import { promises as fs } from 'node:fs';
 import path from 'node:path';
 import { fileURLToPath } from 'node:url';
 
-import * as artifact from '@actions/artifact';
+import { DefaultArtifactClient } from '@actions/artifact';
 import * as core from '@actions/core';
 import { exec } from '@actions/exec';
 import { context, getOctokit } from '@actions/github';
@@ -195,7 +195,7 @@ async function runSizeLimitOnComparisonBranch() {
   const resultsFilePath = getResultsFilePath();
 
   const limit = new SizeLimitFormatter();
-  const artifactClient = artifact.create();
+  const artifactClient = new DefaultArtifactClient();
 
   const { output: baseOutput } = await execSizeLimit();
 

dev-packages/size-limit-gh-action/package.json

@@ -14,7 +14,7 @@
     "fix": "eslint . --format stylish --fix"
   },
   "dependencies": {
-    "@actions/artifact": "1.1.2",
+    "@actions/artifact": "2.1.11",
     "@actions/core": "1.10.1",
     "@actions/exec": "1.1.1",
     "@actions/github": "^5.0.0",