gomod: update zoekt
Created by: keegancsmith
Includes the following changes:
- https://github.com/sourcegraph/zoekt/commit/fe739e1 indexserver: debug list support -exclude_indexed
- https://github.com/sourcegraph/zoekt/commit/204b687 indexeserver: better logging for sourcegraphClient
- https://github.com/sourcegraph/zoekt/commit/3e8cba3 dockerfile: include curl
- https://github.com/sourcegraph/zoekt/commit/8a49c63 indexserver: seperate tmpfriend for debug vs main command
- https://github.com/sourcegraph/zoekt/commit/a118209 indexserver: minor refactors around fetch
- https://github.com/sourcegraph/zoekt/commit/8efa934 ci: add shfmt
Test Plan: CI