fix: examples/browser-exchange-files/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-GOT-2932019
- https://snyk.io/vuln/SNYK-JS-JUSTSAFESET-1920917

Author: snyk-bot

examples/browser-exchange-files/package.json

@@ -18,7 +18,7 @@
     "uint8arrays": "^2.1.3"
   },
   "dependencies": {
-    "ipfs": "^0.55.3",
+    "ipfs": "^0.64.0",
     "it-all": "^1.0.4",
     "libp2p-websockets": "^0.15.6",
     "rimraf": "^3.0.2",