fix(ci): revise playwright install for CI (#4322)

* Revise Playwright install method for CI to avoid browser binary
  mismatch issues.

.github/workflows/ci.yml

@@ -42,7 +42,8 @@ jobs:
         run: pnpm install
       - name: Print put node & npm version
         run: node --version && pnpm --version 
+      # Pin the version of Playwright to match package.json to avoid installing a newer version which may expect different binaries
       - name: Install chromium
-        run: npx playwright install chromium
+        run: npx playwright@1.50.1 install chromium
       - name: Run unit test
         run: pnpm run test

packages/less/package.json

@@ -84,7 +84,7 @@
 		"less-plugin-clean-css": "^1.6.0",
 		"minimist": "^1.2.0",
 		"mocha": "^6.2.1",
-		"playwright": "^1.49.0",
+		"playwright": "~1.50.1",
 		"mocha-teamcity-reporter": "^3.0.0",
 		"nock": "^11.8.2",
 		"npm-run-all": "^4.1.5",