Fix Package Name typo in pip install instructions (prometheus#609)

ngehrsitz · web-flow · commit cc5143c2f46e · 2021-01-01T21:28:28.000Z
Change package name in pip install instructions to match pypi with - instead of _

Signed-off-by: Norman Gehrsitz &lt;gehrsitz.norman@student.dhbw-kahlsruhe.de&gt;
diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@ The official Python 2 and 3 client for [Prometheus](http://prometheus.io).
 
 **One**: Install the client:
 ```
-pip install prometheus_client
+pip install prometheus-client
 ```
 
 **Two**: Paste the following into a Python interpreter:
