fixed linting

code/main.py

@@ -40,7 +40,7 @@ def main():
         azure_credentials = json.loads(azure_credentials)
     except JSONDecodeError:
         print("::error::Please paste output of `az ad sp create-for-rbac --name <your-sp-name> --role contributor --scopes /subscriptions/<your-subscriptionId>/resourceGroups/<your-rg> --sdk-auth` as value of secret variable: AZURE_CREDENTIALS")
-        raise AMLConfigurationException(f"Incorrect or poorly formed output from azure credentials saved in AZURE_CREDENTIALS secret. See setup in https://github.com/Azure/aml-compute/blob/master/README.md")
+        raise AMLConfigurationException("Incorrect or poorly formed output from azure credentials saved in AZURE_CREDENTIALS secret. See setup in https://github.com/Azure/aml-compute/blob/master/README.md")
 
     # Checking provided parameters
     print("::debug::Checking provided parameters")