Bump http-proxy in /examples/canvas_webgl_minimal/www

Bumps [http-proxy](https://github.com/http-party/node-http-proxy) from 1.18.0 to 1.18.1.
- [Release notes](https://github.com/http-party/node-http-proxy/releases)
- [Changelog](https://github.com/http-party/node-http-proxy/blob/master/CHANGELOG.md)
- [Commits](https://github.com/http-party/node-http-proxy/compare/1.18.0...1.18.1)

Signed-off-by: dependabot[bot] <support@github.com>

examples/canvas_webgl_minimal/www/package-lock.json

@@ -2896,9 +2896,9 @@
       }
     },
     "http-proxy": {
-      "version": "1.18.0",
+      "version": "1.18.1",
-      "resolved": "https://registry.npmjs.org/http-proxy/-/http-proxy-1.18.0.tgz",
+      "resolved": "https://registry.npmjs.org/http-proxy/-/http-proxy-1.18.1.tgz",
-      "integrity": "sha512-84I2iJM/n1d4Hdgc6y2+qY5mDaz2PUVjlg9znE9byl+q0uC3DeByqBGReQu5tpLK0TAqTIXScRUV+dg7+bUPpQ==",
+      "integrity": "sha512-7mz/721AbnJwIVbnaSv1Cz3Am0ZLT/UBwkC92VlxhXv/k/BBQfM2fXElQNC27BVGr0uwUpplYPQM9LnaBMR5NQ==",
       "dev": true,
       "requires": {
         "eventemitter3": "^4.0.0",