Update codeflash/result/common_tags.py

Co-authored-by: codeflash-ai[bot] <148906541+codeflash-ai[bot]@users.noreply.github.com>

Author: misrasaurabh1

codeflash/result/common_tags.py

@@ -5,7 +5,7 @@ def find_common_tags(articles: list[dict[str, list[str]]]) -> set[str]:
     if not articles:
         return set()
 
-    common_tags = articles[0].get("tags", [])
+    common_tags = set(articles[0].get("tags", []))
     for article in articles[1:]:
-        common_tags = [tag for tag in common_tags if tag in article.get("tags", [])]
-    return set(common_tags)
+        common_tags.intersection_update(article.get("tags", []))
+    return common_tags