fix(ci): restore untracked-file detection in record-benchmarks (#1040)

Each of the three pre-consolidation jobs paired `git diff --quiet HEAD`
with `git ls-files --others --exclude-standard` so a first-run history
file (or one re-created after deletion) would still be picked up. The
consolidated check dropped that second guard, which would silently skip
the PR step if a benchmark history file was untracked. Restore the
guard so verified numbers always make it back to main.

Author: carlos-alm

.github/workflows/benchmark.yml

@@ -68,6 +68,9 @@ jobs:
           if ! git diff --quiet HEAD -- generated/benchmarks/ README.md 2>/dev/null; then
             CHANGED=true
           fi
+          if [ -n "$(git ls-files --others --exclude-standard generated/benchmarks/)" ]; then
+            CHANGED=true
+          fi
           echo "changed=$CHANGED" >> "$GITHUB_OUTPUT"
 
       - name: Commit and push via PR