fix: my-app/package.json & my-app/package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BOOTSTRAP-7444593
- https://snyk.io/vuln/SNYK-JS-BOOTSTRAP-7444617

Author: snyk-bot

my-app/package-lock.json

@@ -7,7 +7,7 @@
     "@testing-library/jest-dom": "^6.0.0",
     "@testing-library/react": "^13.4.0",
     "@testing-library/user-event": "^13.5.0",
-    "bootstrap": "^3.4.1",
+    "bootstrap": "^4.0.0",
     "react": "^18.3.1",
     "react-bootstrap": "^2.10.1",
     "react-dom": "^18.3.1",