Update cfapi.py

Avoid `TypeError: dict.get() takes no keyword arguments` when using env variables with `codeflash optimize`

Author: aseembits93

codeflash/api/cfapi.py

@@ -26,7 +26,7 @@
 
 from packaging import version
 
-if os.environ.get("CODEFLASH_CFAPI_SERVER", default="prod").lower() == "local":
+if os.environ.get("CODEFLASH_CFAPI_SERVER", "prod").lower() == "local":
     CFAPI_BASE_URL = "http://localhost:3001"
     logger.info(f"Using local CF API at {CFAPI_BASE_URL}.")
     console.rule()