Bump the build-npm group across 1 directory with 2 updates

Bumps the build-npm group with 2 updates in the /build/npm directory: [chai](https://github.com/chaijs/chai) and [mocha](https://github.com/mochajs/mocha).


Updates `chai` from 5.2.1 to 6.2.0
- [Release notes](https://github.com/chaijs/chai/releases)
- [Changelog](https://github.com/chaijs/chai/blob/main/History.md)
- [Commits](chaijs/chai@v5.2.1...v6.2.0)

Updates `mocha` from 11.7.1 to 11.7.3
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/main/CHANGELOG.md)
- [Commits](mochajs/mocha@v11.7.1...v11.7.3)

---
updated-dependencies:
- dependency-name: chai
  dependency-version: 6.2.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: build-npm
- dependency-name: mocha
  dependency-version: 11.7.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: build-npm
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build/npm/package-lock.json

@@ -24,8 +24,8 @@
   },
   "homepage": "https://github.com/getgauge/gauge#readme",
   "devDependencies": {
-    "chai": "^5.2.1",
-    "mocha": "^11.7.1",
+    "chai": "^6.2.0",
+    "mocha": "^11.7.3",
     "sinon": "^21.0.0"
   },
   "dependencies": {