build(deps-dev): Bump @fastify/multipart from 7.7.3 to 8.2.0

Bumps [@fastify/multipart](https://github.com/fastify/fastify-multipart) from 7.7.3 to 8.2.0.
- [Release notes](https://github.com/fastify/fastify-multipart/releases)
- [Commits](fastify/fastify-multipart@v7.7.3...v8.2.0)

---
updated-dependencies:
- dependency-name: "@fastify/multipart"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -30,7 +30,7 @@
   "homepage": "https://github.com/fastify/fastify-reply-from#readme",
   "devDependencies": {
     "@fastify/formbody": "^7.4.0",
-    "@fastify/multipart": "^7.4.0",
+    "@fastify/multipart": "^8.2.0",
     "@fastify/pre-commit": "^2.0.2",
     "@sinonjs/fake-timers": "^11.0.0",
     "@types/node": "^20.1.4",