phi model readme (#11595)

Co-authored-by: rnwang04 <ruonan1.wang@intel.com>

python/llm/example/CPU/HF-Transformers-AutoModels/Model/phi-1_5/README.md

@@ -25,6 +25,7 @@ conda activate llm
 # install the latest ipex-llm nightly build with 'all' option
 pip install --pre --upgrade ipex-llm[all] --extra-index-url https://download.pytorch.org/whl/cpu
 pip install einops  # additional package required for phi-1_5 to conduct generation
+pip install "transformers>=4.37.0,<4.42.0"  # install right transformers version
 ```
 
 On Windows:

python/llm/example/CPU/HF-Transformers-AutoModels/Model/phi-2/README.md

@@ -25,7 +25,7 @@ conda activate llm
 # install the latest ipex-llm nightly build with 'all' option
 pip install --pre --upgrade ipex-llm[all] --extra-index-url https://download.pytorch.org/whl/cpu
 pip install einops  # additional package required for phi-2 to conduct generation
-pip install transformers==4.37.0
+pip install "transformers>=4.37.0,<4.42.0"  # install right transformers version
 ```
 On Windows:
 
@@ -35,7 +35,7 @@ conda activate llm
 
 pip install --pre --upgrade ipex-llm[all]
 pip install einops
-pip install transformers==4.37.0
+pip install "transformers>=4.37.0,<4.42.0"  # install right transformers version
 ```
 
 ### 2. Run

python/llm/example/GPU/HuggingFace/LLM/phi-1_5/README.md

@@ -16,6 +16,7 @@ conda activate llm
 pip install --pre --upgrade ipex-llm[xpu] --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/xpu/us/
 
 pip install einops # additional package required for phi-1_5 to conduct generation
+pip install "transformers>=4.37.0,<4.42.0"  # install right transformers version
 ```
 
 #### 1.2 Installation on Windows
@@ -28,6 +29,7 @@ conda activate llm
 pip install --pre --upgrade ipex-llm[xpu] --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/xpu/us/
 
 pip install einops # additional package required for phi-1_5 to conduct generation
+pip install "transformers>=4.37.0,<4.42.0"  # install right transformers version
 ```
 
 ### 2. Configures OneAPI environment variables for Linux

python/llm/example/GPU/HuggingFace/LLM/phi-2/README.md

@@ -16,7 +16,7 @@ conda activate llm
 pip install --pre --upgrade ipex-llm[xpu] --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/xpu/us/
 
 pip install einops # additional package required for phi-2 to conduct generation
-pip install transformers==4.37.0
+pip install "transformers>=4.37.0,<4.42.0"  # install right transformers version
 ```
 
 #### 1.2 Installation on Windows
@@ -29,7 +29,7 @@ conda activate llm
 pip install --pre --upgrade ipex-llm[xpu] --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/xpu/us/
 
 pip install einops # additional package required for phi-2 to conduct generation
-pip install transformers==4.37.0
+pip install "transformers>=4.37.0,<4.42.0"  # install right transformers version
 ```
 
 ### 2. Configures OneAPI environment variables for Linux