Bump submodules/vipr from f01f68c to 977f349

Bumps [submodules/vipr](https://github.com/microsoft/vipr) from `f01f68c` to `977f349`.
- [Release notes](https://github.com/microsoft/vipr/releases)
- [Commits](microsoft/Vipr@f01f68c...977f349)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]