Fix benchmark workflow: syntax error from stale code after avg_runs()

[Copilot]

The benchmark (macos-latest) job (and all OS variants) failed with syntax error near unexpected token 'done' due to leftover lines from the old avg_runs() body that were never removed when the function was rewritten to track failures.

Root cause

When failure-tracking logic was added to avg_runs(), the new function body was inserted correctly but the old closing lines were left orphaned immediately after:

          avg_runs() {
            # ... new body ending with ...
            awk "BEGIN {printf \"%.2f\", $sum / $success}"
          }
            done                                           # ← orphaned
            awk "BEGIN {printf \"%.2f\", $sum / $n}"      # ← orphaned
          }                                               # ← orphaned

The bare done with no enclosing loop triggers an immediate syntax error, aborting the entire step.

Fix

• Remove the 3 stale lines (orphaned done, awk, and }) from the Run benchmark step in .github/workflows/benchmark.yml

Original prompt

Fix the failing GitHub Actions workflow benchmark (macos-latest)
Analyze the workflow logs, identify the root cause of the failure, and implement a fix.
Job ID: 65348374252
Job URL: https://github.com/javaevolved/javaevolved.github.io/actions/runs/22561315511/job/65348374252

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