Update app.py

app.py

@@ -15,7 +15,7 @@ from utilities import get_file
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 GEMINI_API_KEY = os.getenv("Gemini_API_key")
-os.environ("SERPER_API_KEY") = os.getenv("SERPER_API_KEY")
+SERPER_API_KEY = os.getenv("SERPER_API_KEY")
 
 # --- Basic Agent Definition ---
 # Agent capabilities required: Search the web, listen to audio recordings, watch YouTube videos (process the footage, not the transcript), work with Excel spreadsheets