Update documentation warnings about 2.9 deletion

Author: samanklesaria

README.md

@@ -8,12 +8,11 @@ torchaudio: an audio library for PyTorch
 ![TorchAudio Logo](docs/source/_static/img/logo.png)
 
 > [!NOTE]
-> **We are in the process of refactoring TorchAudio and transitioning it into a
->  maintenance phase. This process will include removing some user-facing
->  features: those features are deprecated from TorchAudio 2.8 and will be removed in 2.9.
->  Our main goals are to reduce redundancies with the rest of the
+> **TorchAudio 2.9 has been transitioned into a maintenance phase. Many user-facing
+>  features that were deprecated in TorchAudio 2.8 have been removed as of 2.9.
+>  Our main goals were to reduce redundancies with the rest of the
 >  PyTorch ecosystem, make it easier to maintain, and create a version of
->  TorchAudio that is more tightly scoped to its strengths: processing audio
+>  TorchAudio that was more tightly scoped to its strengths: processing audio
 >  data for ML. Please see
 >  [our community message](https://github.com/pytorch/audio/issues/3902)
 >  for more details.**
@@ -70,7 +69,7 @@ If you find this package useful, please cite as:
 
 ```bibtex
 @misc{hwang2023torchaudio,
-      title={TorchAudio 2.1: Advancing speech recognition, self-supervised learning, and audio processing components for PyTorch}, 
+      title={TorchAudio 2.1: Advancing speech recognition, self-supervised learning, and audio processing components for PyTorch},
       author={Jeff Hwang and Moto Hira and Caroline Chen and Xiaohui Zhang and Zhaoheng Ni and Guangzhi Sun and Pingchuan Ma and Ruizhe Huang and Vineel Pratap and Yuekai Zhang and Anurag Kumar and Chin-Yun Yu and Chuang Zhu and Chunxi Liu and Jacob Kahn and Mirco Ravanelli and Peng Sun and Shinji Watanabe and Yangyang Shi and Yumeng Tao and Robin Scheibler and Samuele Cornell and Sean Kim and Stavros Petridis},
       year={2023},
       eprint={2310.17864},

docs/source/index.rst

@@ -8,12 +8,12 @@ It provides I/O, signal and data processing functions, datasets,
 model implementations and application components.
 
 .. note::
-    Starting with version 2.8, we are refactoring TorchAudio to transition it
+    Starting with version 2.8, TorchAudio has transitioned
     into a maintenance phase. As a result:
 
-    - Some APIs are deprecated in 2.8 and will be removed in 2.9.
+    - Some APIs were deprecated in 2.8 and removed in 2.9.
     - The decoding and encoding capabilities of PyTorch for both audio and video
-      are being consolidated into TorchCodec.
+      have been consolidated into TorchCodec.
 
     Please see https://github.com/pytorch/audio/issues/3902 for more information.