Fix "pip install" in readme (#233)

Package name must be wrapped with "" if there's  a ">= " in it

Author: daniil-quix

README.md

@@ -43,16 +43,15 @@ Use Quix Streams to build event-driven, machine learning/AI or physics-based app
 To install the latest alpha version of Quix Streams 2.0: 
 
 ```shell
-python -m pip install quixstreams>=2.0a
+python -m pip install --pre quixstreams
 ```
 
 or
 
 ```shell
-python -m pip install --pre quixstreams
+python -m pip install "quixstreams>=2.0a"
 ```
 
-
 #### Requirements
 Python 3.8+, Apache Kafka 0.10+