Align hugging face link of DeepSeek V3 and its MTP module in the MTP Blog

[sammysun0711]

Objective of the new blog:
Please describe the intent of the blog.

As blog described, DeepSeek V3/R1 + its MTP module are both supported for SGLang with ROCm.
It will be easier for developer to reproduce the results that we keep consistent of hugging face model of DeepSeek V3 and its MTP module in Download the Model Weights and Launch the Server section:

• Main model: https://huggingface.co/deepseek-ai/DeepSeek-V3
• MTP module: https://huggingface.co/lmsys/DeepSeek-V3-NextN

Signoff section must be completed prior to publishing.

• Technical reviewer approves publishing: (edit and replace with @githubid)
• Editorial team approved publishing: (edit and replace with @githubid)
• Add a thumbnail image for your blog if one is available
• Text nugget summarizing your article. 2-3 lines to draw the reader's attention. Possibly the opening paragraph can be used.
• Blog author team signoffs
  • AMD Employees only: Legal self review traffic lights completed: (edit and replace with @githubid)
  • Licenses file included for content is correct: (edit and replace with @githubid)
  • Changes from technical review and editorial team are acceptable: (edit and replace with @githubid)

[Ehud-Sharlin]

Please merge: edit to an existing blog