updated locust test_leis.json file path (#524)

Updated the leis.py script reference to the correct path to
test_leis.json when running tests locally

## Changes

updated to correct url path

## Testing

1. successfully ran the tests from the localhost browser

### Browsers

- [x] Chrome

locust-load-test/locust_scripts/leis.py

@@ -12,7 +12,7 @@ def get_leis():
         with httpx.Client() as client:
             url = os.getenv(
                 "LEI_REPO",
-                "https://raw.githubusercontent.com/cfpb/sbl-test-data/test_leis/",
+                "https://raw.githubusercontent.com/cfpb/sbl-test-data/refs/heads/main/test_leis/",
             )
             full_path = url + os.getenv("LEI_FILE", "test_leis.json")
             response = client.get(full_path)