Update README.rst

Author: AnsArn

README.rst

@@ -34,19 +34,22 @@ Installation
 ------------
 
 Install GDAL:
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 .. code-block:: console
 
     sudo apt-get install gdal-bin libgdal-dev
     pip install --upgrade gdal==`gdal-config --version` pybind11  # with pip
 
 Install COSIPY with pip (for general use):
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 .. code-block:: console
 
     pip install cosipymodel
     cosipy-setup  # generate template configuration files
     cosipy-help   # view help
 
 Install COSIPY from source (for development):
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 .. code-block:: console
 
     git clone https://github.com/cryotools/cosipy.git