update readme

README.md

@@ -44,24 +44,24 @@ pip install git+https://github.com/microsoft/mattersim.git
 ### Install from source code
 1. Download the source code of MatterSim and change to the directory
 
-    ```bash
-    git clone [email protected]:microsoft/mattersim.git
-    cd mattersim
-    ```
+```bash
+git clone [email protected]:microsoft/mattersim.git
+cd mattersim
+```
 
 2. Install MatterSim
 
-    > [!WARNING]
-    > We strongly recommend that users install MatterSim using [mamba or micromamba](https://mamba.readthedocs.io/en/latest/index.html), because *conda* can be significantly slower when resolving the dependencies in environment.yaml.
+> [!WARNING]
+> We strongly recommend that users install MatterSim using [mamba or micromamba](https://mamba.readthedocs.io/en/latest/index.html), because *conda* can be significantly slower when resolving the dependencies in environment.yaml.
 
-    To install the package, run the following command under the root of the folder:
+To install the package, run the following command under the root of the folder:
 
-    ```bash
-    mamba env create -f environment.yaml
-    mamba activate mattersim
-    pip install -e .
-    python setup.py build_ext --inplace
-    ```
+```bash
+mamba env create -f environment.yaml
+mamba activate mattersim
+pip install -e .
+python setup.py build_ext --inplace
+```
 
 ## Usage
 ### A minimal test