fix: apps/block_scout_web/assets/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BOOTSTRAP-7444580
- https://snyk.io/vuln/SNYK-JS-BOOTSTRAP-7444617

apps/block_scout_web/assets/package.json

@@ -24,7 +24,7 @@
     "@walletconnect/web3-provider": "^1.8.0",
     "assert": "^2.0.0",
     "bignumber.js": "^9.1.0",
-    "bootstrap": "^4.6.0",
+    "bootstrap": "^5.0.0",
     "chart.js": "^3.9.1",
     "chartjs-adapter-luxon": "^1.2.0",
     "clipboard": "^2.0.11",