Update dependency js-yaml to v3.15.0 [SECURITY]

Author: renovate[bot]

package.json

@@ -27,7 +27,7 @@
     "@actions/core": "1.2.7",
     "@actions/github": "^5.1.1",
     "istextorbinary": "^6.0.0",
-    "js-yaml": "3.14.1"
+    "js-yaml": "3.15.0"
   },
   "devDependencies": {
     "@vercel/ncc": "^0.36.0",