chore: mount secret

[foo0x29a]

Description

• mount secret for cargo install

Bug fix (non-breaking change which fixes an issue)

This aims to fix errors such as:
https://github.com/topos-network/topos/actions/runs/4488813780/jobs/7893871473

Mouting the secret for cargo install cargo-nextest --locked solves the ObjectPermissionDenied issue:

#8 2.585 sccache: error: Server startup failed: cache storage failed to read: ObjectPermissionDenied (permanent) at read => S3Error { code: "AccessDenied", message: "Access Denied", resource: "", request_id: "GC3RNAS45P5SJ2E0" }

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works