Fix broken link

Differential Revision: D44598111

Pull Request resolved: #716

Author: priyaramani

torchx/schedulers/lsf_scheduler.py

@@ -19,7 +19,7 @@
 you can install LSF Community Edition.
 
 See the LSF documentation for more details:
-https://www.ibm.com/support/pages/where-do-i-download-lsf-community-edition
+https://www.ibm.com/docs/en/cloud-private/3.2.x?topic=paks-spectrum-lsf-community-edition
 """
 import os.path
 import re