Bump submodules/vipr from 2c9ed0a to 35aaacf (#1083)

Bumps [submodules/vipr](https://github.com/microsoft/vipr) from `2c9ed0a` to `35aaacf`.
- [Release notes](https://github.com/microsoft/vipr/releases)
- [Commits](microsoft/Vipr@2c9ed0a...35aaacf)

---
updated-dependencies:
- dependency-name: submodules/vipr
  dependency-type: direct:production
...

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Author: dependabot[bot]