Bump fast-uri from 3.1.7 to 3.1.8 in /extensions/ql-vscode

Bumps [fast-uri](https://github.com/fastify/fast-uri) from 3.1.7 to 3.1.8.
- [Release notes](https://github.com/fastify/fast-uri/releases)
- [Commits](fastify/fast-uri@v3.1.7...v3.1.8)

---
updated-dependencies:
- dependency-name: fast-uri
  dependency-version: 3.1.8
  dependency-type: indirect
...

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Author: dependabot[bot]