Update dependency js-yaml to v4

Author: renovate-bot

package.json

@@ -26,7 +26,7 @@
   "dependencies": {
     "@actions/core": "1.2.6",
     "@actions/github": "3.0.0",
-    "js-yaml": "3.14.1",
+    "js-yaml": "4.0.0",
     "istextorbinary": "5.12.0"
   },
   "devDependencies": {