Fix typo in documentation (#4284)

python.d/README.md

@@ -1412,7 +1412,7 @@ If no configuration is given, module will attempt to connect to mongodb daemon o
 
 # monit
 
-Monit monitoring module. Data is grabbed from stats XML interface (exsists for a long time, but not mentioned in official documentation). Mostly this plugin shows statuses of monit targets, i.e. [statuses of specified checks](https://mmonit.com/monit/documentation/monit.html#Service-checks).
+Monit monitoring module. Data is grabbed from stats XML interface (exists for a long time, but not mentioned in official documentation). Mostly this plugin shows statuses of monit targets, i.e. [statuses of specified checks](https://mmonit.com/monit/documentation/monit.html#Service-checks).
 
 1. **Filesystems**
  * Filesystems