Fix documentation

kafka-ui-e2e-checks/README.md

@@ -52,7 +52,7 @@ docker-compose -f documentation/compose/e2e-tests.yaml up -d
 ```
 2. Run tests using your QaseIO API token as environment variable (put instead %s into command below)
 ```
-mvn -DQASEIO_API_TOKEN=‘%s’ -pl ‘!kafka-ui-api’ test -Pprod
+mvn -DQASEIO_API_TOKEN='%s' -pl '!kafka-ui-api' test -Pprod
 ```
 
 ### Reporting