Update README.md

Author: Turall

README.md

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 # Python Open Policy Agent (OPA) Client 
 
-[![Downloads](https://pepy.tech/badge/opa-python-client/month)](https://pepy.tech/project/opa-python-client/month)
+[![Downloads](https://pepy.tech/badge/opa-python-client)](https://pepy.tech/project/opa-python-client)
 
 See offical documentation page [Open Policy Agent](https://www.openpolicyagent.org/docs/latest/)