chore(deps): bump fast-uri in /actions/helm/generate-docs

Bumps [fast-uri](https://github.com/fastify/fast-uri) from 3.1.0 to 3.1.2.
- [Release notes](https://github.com/fastify/fast-uri/releases)
- [Commits](fastify/fast-uri@v3.1.0...v3.1.2)

---
updated-dependencies:
- dependency-name: fast-uri
  dependency-version: 3.1.2
  dependency-type: indirect
...

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

Author: dependabot[bot]