Update Llama2 Members download instructions with new form. (#1781)

* Update Llama2 Members download instructions

* Add clarifying language

* Add member access details

language/llama2-70b/README.md

@@ -67,7 +67,7 @@ CPU-only setup, as well as any GPU versions for applicable libraries like PyTorc
 
 ## Get Model
 ### MLCommons Members Download
-MLCommons hosts the model and preprocessed dataset for download exclusively by MLCommons Members. You must first agree to the [confidentiality notice](https://docs.google.com/forms/d/e/1FAIpQLSc_8VIvRmXM3I8KQaYnKf7gy27Z63BBoI_I1u02f4lw6rBp3g/viewform), then follow the link to a directory containing Rclone download instructions.
+MLCommons hosts the model and preprocessed dataset for download **exclusively by MLCommons Members**. You must first agree to the [confidentiality notice](https://llama2.mlcommons.org) using your organizational email address, then you will receive a link to a directory containing Rclone download instructions. _If you cannot access the form but you are part of a MLCommons Member organization, submit the [MLCommons subscription form](https://mlcommons.org/community/subscribe/) with your organizational email address and [associate a Google account](https://accounts.google.com/SignUpWithoutGmail) with your organizational email address._
 
 
 ### External Download