style: fix black formatting for referer test assertions

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: chemystery09

tests/test_trigger.py

@@ -661,7 +661,9 @@ def test_extract_http_tags_referer_case_insensitive(self):
 
         event = {"headers": {"Referer": "https://example.com/capitalized"}}
         http_tags = extract_http_tags(event)
-        self.assertEqual(http_tags.get("http.referer"), "https://example.com/capitalized")
+        self.assertEqual(
+            http_tags.get("http.referer"), "https://example.com/capitalized"
+        )
 
         event = {"headers": {"referer": "https://example.com/lowercase"}}
         http_tags = extract_http_tags(event)