Update README.md

Author: jmrozanec

README.md

@@ -16,7 +16,7 @@ cron-utils is available on [Maven central](http://search.maven.org/#search%7Cga%
     <dependency>
         <groupId>com.cronutils</groupId>
         <artifactId>cron-utils</artifactId>
-        <version>9.1.6</version>
+        <version>9.1.7</version>
     </dependency>
 
 For Android developers, cron-utils 7.0.0 assumes Android 26+. For earlier Android versions consider using cron-utils 6.0.6.