fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-EJS-1049328
- https://snyk.io/vuln/SNYK-JS-MARKED-1070800

package.json

@@ -23,11 +23,11 @@
     "csurf": "^1.10.0",
     "dompurify": "^2.0.7",
     "dotenv": "^8.1.0",
-    "ejs": "^2.6.2",
+    "ejs": "^3.1.6",
     "express": "^4.17.1",
     "express-session": "^1.16.2",
     "jsonwebtoken": "^8.5.1",
-    "marked": "^1.1.1",
+    "marked": "^2.0.0",
     "md5": "^2.2.1",
     "mongodb": "^3.3.0",
     "nodemon": "^2.0.3",