Revert "ci: use chromium from ubuntu repos"

This reverts commit e6ffcf6.

Author: xi

.github/workflows/main.yml

@@ -5,11 +5,10 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - uses: actions/setup-node@v6
-    - run: sudo apt-get install -y chromium
     - name: dependencies
       run: npm install
     - run: mkdir -p dist
     - name: build
       run: npx rollup index.js -o dist/aria.js -f umd -n aria
     - name: test
-      run: PUPPETEER_EXECUTABLE_PATH=$(which chromium)  npx mocha-headless-chrome -a no-sandbox -f test/index.html
+      run: npx mocha-headless-chrome -a no-sandbox -f test/index.html