fix(ci): update trivy to v0.69.3 and bump protobuf 6.33.2 → 6.33.5 (#304)

## Summary

- Update trivy from v0.68.2/v0.58.2 to v0.69.3 — old versions no longer
have downloadable release assets on GitHub, causing the Code Quality
Checks CI to fail
- Incorporate protobuf bump from 6.33.2 to 6.33.5 in
`examples/simple/uv.lock` (from #294)

Resolves https://github.com/dgraph-io/pydgraph/security/dependabot/12

Supersedes #294.

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: mlwelles