Update README with latest news on nano-v3 (#15197)

* Update README with latest news on nano-v3

Added news about NVIDIA-Nemotron-3-Nano-30B release and repo pivot.

Signed-off-by: Wenwen Gao <94138584+snowmanwwg@users.noreply.github.com>

* Update NVIDIA-Nemotron link in README

Signed-off-by: Wenwen Gao <94138584+snowmanwwg@users.noreply.github.com>

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Signed-off-by: Wenwen Gao <94138584+snowmanwwg@users.noreply.github.com>

Author: snowmanwwg

README.md

@@ -12,6 +12,12 @@
 ## Latest News
 
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+<details open>
+  <summary><b> <a href=https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Nano-30B-A3B-BF16>NVIDIA-Nemotron-3-Nano-30B-A3B</a> is out with full reproducible script and recipes! Checkout <a href=https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/nano-v3>NeMo Megatron-Bridge</a>, <a href=https://github.com/NVIDIA-NeMo/Automodel/blob/main/examples/llm_finetune/nemotron/nemotron_nano_v3_squad.yaml>NeMo AutoModel</a>, <a href=https://github.com/NVIDIA-NeMo/RL>NeMo-RL</a> and <a href=https://catalog.ngc.nvidia.com/orgs/nvidia/containers/nemo?version=25.11.nemotron_3_nano>NGC container</a> to try them!(2025-12-15)
+</details>
+
+
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 <details open>
   <summary><b>Pivot notice: This repo will pivot to focus on speech models collections only. Please refer to <a href=https://github.com/NVIDIA-NeMo>NeMo Framework Github Org</a> for the complete list of repos under NeMo Framework</b></summary>
       NeMo 2.0, with its support for LLMs and VLMs will be deprecated by 25.11, and replaced by <a href=https://github.com/NVIDIA-NeMo/Megatron-Bridge>NeMo Megatron-Bridge</a> and <a href=https://github.com/NVIDIA-NeMo/Automodel>NeMo Automodel</a>. More details can be find in the <a href=https://github.com/NVIDIA-NeMo>NeMo Framework github org readme</a>. (2025-10-10)