Update phi3 lora example documentation

Differential Revision: D61141396

Pull Request resolved: #4670

Author: jackzhxng

examples/models/phi3-mini-lora/README.md

@@ -5,9 +5,8 @@ In this exmaple, we export a model ([phi-3-mini](https://github.com/pytorch/exec
 ### Step 1: [Optional] Install ExecuTorch dependencies
 `./install_requirements.sh` in ExecuTorch root directory.
 
-### Step 2: Install TorchTune nightly
-The LoRA model used is recent and is not yet officially released on `TorchTune`. To be able to run this example, you will need to run the following to install TorchTune nighly:
-- `./examples/models/llava_encoder/install_requirements.sh`'
+### Step 2: Install Requirements
+- `./examples/models/phi3-mini-lora/install_requirements.sh`
 
 ### Step 3: Export and run the model
 1. Export the model to ExecuTorch.

examples/models/phi3-mini-lora/install_requirements.sh

@@ -5,6 +5,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# Install nightly build of TorchTune.
-pip install --pre torchtune --extra-index-url https://download.pytorch.org/whl/nightly/cpu --no-cache-dir
+pip install torchvision
+pip install torchtune
 pip install tiktoken