deps(dev): bump mocha from 10.7.0 to 10.7.3

Bumps [mocha](https://github.com/mochajs/mocha) from 10.7.0 to 10.7.3.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/main/CHANGELOG.md)
- [Commits](mochajs/mocha@v10.7.0...v10.7.3)

---
updated-dependencies:
- dependency-name: mocha
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

observer/package.json

@@ -10,7 +10,7 @@
     "test": "mocha"
   },
   "devDependencies": {
-    "mocha": "^10.7.0",
+    "mocha": "^10.7.3",
     "spark-evaluate": "github:filecoin-station/spark-evaluate#main",
     "standard": "^17.1.0"
   },

stats/package.json

@@ -10,7 +10,7 @@
   },
   "devDependencies": {
     "@filecoin-station/spark-stats-db": "^1.0.0",
-    "mocha": "^10.7.0",
+    "mocha": "^10.7.3",
     "spark-evaluate": "filecoin-station/spark-evaluate#main",
     "standard": "^17.1.0"
   },