[flake8-simplify] Avoid some more enumerate-for-loop false positives (SIM113)

[charliermarsh]

Avoids, e.g., this false positive from the ecosystem check.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

ℹ️ ecosystem check detected linter changes. (+0 -3 violations, +0 -0 fixes in 1 projects; 42 projects unchanged)

zulip/zulip (+0 -3 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --preview --select ALL

- zerver/data_import/slack.py:634:9: SIM113 Use `enumerate()` for index variable `recipient_id_count` in `for` loop
- zerver/data_import/slack.py:635:9: SIM113 Use `enumerate()` for index variable `subscription_id_count` in `for` loop
- zilencer/management/commands/populate_db.py:705:17: SIM113 Use `enumerate()` for index variable `i` in `for` loop

Changes by rule (1 rules affected)

code	total	+ violation	- violation	+ fix	- fix
SIM113	3	0	3	0	0