Update README.md (#2827)

Added instructions to clone the repo and change directory into it. 

In following steps there is a "make install" step that would fail if people have not cloned the repo and cd into it, so it may be confusing for some

Added python venv alternative to conda too.

README.md

@@ -196,14 +196,26 @@ Detailed blogpost by Adyen on TGI inner workings: [LLM inference at scale with T
 
 You can also opt to install `text-generation-inference` locally.
 
-First [install Rust](https://rustup.rs/) and create a Python virtual environment with at least
-Python 3.9, e.g. using `conda`:
+First clone the repository and change directoy into it:
+
+```shell
+git clone https://github.com/huggingface/text-generation-inference
+cd text-generation-inference
+```
+
+Then [install Rust](https://rustup.rs/) and create a Python virtual environment with at least
+Python 3.9, e.g. using `conda` or `python venv`:
 
 ```shell
 curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
 
+#using conda
 conda create -n text-generation-inference python=3.11
 conda activate text-generation-inference
+
+#using pyton venv
+python3 -m venv .venv
+source .venv/bin/activate
 ```
 
 You may also need to install Protoc.