Bump @types/mssql from 9.1.5 to 9.1.6

Bumps [@types/mssql](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/mssql) from 9.1.5 to 9.1.6.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/mssql)

---
updated-dependencies:
- dependency-name: "@types/mssql"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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