refactor(ci): remove display name override from secrets-scan job

Remove `name: gitleaks` override from secrets-scan job to align with
infra repository's naming convention.

Rationale:
- "secrets-scan" is more generic and describes the job's purpose
- "gitleaks" is just the implementation tool (could be swapped)
- Consistency between job ID and display name improves clarity
- Matches pattern established in infra repository

The job ID remains `secrets-scan`, so no changes needed to job
dependencies or workflow logic.

Author: cameronraysmith

.github/workflows/ci.yaml

@@ -56,7 +56,6 @@ jobs:
   # scans repository for hardcoded secrets using gitleaks
   # Security critical - runs for all commits
   secrets-scan:
-    name: gitleaks
     runs-on: ubuntu-latest
     if: |
       !cancelled() &&