v0.13.1 Patch release

What's Changed

• Update version.txt after 0.13.0 release by @mrwyattii in #4982
• Update FastGen blog title by @arashb in #4983
• Fix the MoE-params gradient-scaling by @RezaYazdaniAminabadi in #4957
• fix some typo under blogs/ by @digger-yu in #4988
• Fix placeholder value in FastGen Blog by @mrwyattii in #5000
• fix for DS_ENV issue by @jeffra in #4992
• Delete unused --deepspeed_mpi command line argument by @ShukantPal in #4981
• Make installable without torch by @mrwyattii in #5001
• Implement some APIs of HPU accelerator by @mmhab in #4935
• Refactor the Qwen positional emebdding config code by @ZonePG in #4955

Full Changelog: v0.13.0...v0.13.1