Call out axolotl + QAT integration on README (#2442)

Author: andrewor14

README.md

@@ -25,6 +25,7 @@
 ## 📣 Latest News
 
 - [Jun 25] Our [TorchAO paper](https://codeml-workshop.github.io/codeml2025/) was accepted to CodeML @ ICML 2025!
+- [May 25] QAT is now integrated into [Axolotl](https://github.com/axolotl-ai-cloud/axolotl) for fine-tuning ([docs](https://docs.axolotl.ai/docs/qat.html))!
 - [Apr 25] Float8 rowwise training yielded [1.34-1.43x training speedup](https://pytorch.org/blog/accelerating-large-scale-training-and-convergence-with-pytorch-float8-rowwise-on-crusoe-2k-h200s/) at 2k H100 GPU scale
 - [Apr 25] TorchAO is added as a [quantization backend to vLLM](https://docs.vllm.ai/en/latest/features/quantization/torchao.html) ([docs](https://docs.vllm.ai/en/latest/features/quantization/torchao.html))!
 - [Mar 25] Our [2:4 Sparsity paper](https://openreview.net/pdf?id=O5feVk7p6Y) was accepted to SLLM @ ICLR 2025!