fix: exercises/c4-demos-master/05-http-metrics/package.json & exercises/c4-demos-master/05-http-metrics/package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-6671926

Author: snyk-bot

exercises/c4-demos-master/05-http-metrics/package-lock.json

@@ -10,7 +10,7 @@
     "author": "",
     "license": "ISC",
     "dependencies": {
-        "axios": "^0.18.0"
+        "axios": "^1.7.8"
     },
     "devDependencies": {
         "aws-sdk": "^2.432.0"