fixes invalid rule from hyphen (#11484)

## Summary

When using `add_rule.py`, it produces the following line in `codes.rs`
```
        (Flake8Async, "102") => (RuleGroup::Stable, rules::flake8-async::rules::BlockingOsCallInAsyncFunction),
```

Causing a syntax error.

This PR resolves that issue so that the script can be used again.

## Test Plan

Tested manually in new rule creation

scripts/add_rule.py

@@ -137,7 +137,8 @@ def main(*, name: str, prefix: str, code: str, linter: str) -> None:
             lines.append(line)
 
         variant = pascal_case(linter)
-        rule = f"""rules::{linter.split(" ")[0]}::rules::{name}"""
+        linter_name = linter.split(" ")[0].replace("-", "_")
+        rule = f"""rules::{linter_name}::rules::{name}"""
         lines.append(
             " " * 8 + f"""({variant}, "{code}") => (RuleGroup::Preview, {rule}),\n""",
         )