Update app.py

app.py

@@ -213,7 +213,7 @@ class TransformersTimelineParser:
                         pass
             elif (match_fallback := re.search(pattern_fallback, content)):
                 release_date = None
-                transformers_date = match.group(1)
+                transformers_date = match_fallback.group(1)
                 # Validate the Transformers date (this is the critical one for our timeline)
                 try:
                     datetime.strptime(transformers_date, "%Y-%m-%d")