Update requirements/pytorch/strategies.txt

Author: carmocca

requirements/pytorch/strategies.txt

@@ -1,5 +1,5 @@
 fairscale>=0.4.5, <=0.4.6
-deepspeed<0.6.5
+deepspeed>=0.6.0, <0.6.5
 # no need to install with [pytorch] as pytorch is already installed
 horovod>=0.21.2, !=0.24.0, <0.25.1
 hivemind>=1.0.1, <=1.0.1; sys_platform == 'linux'