go to jdk 17 as required in README.md

Author: dedece35

pom.xml

@@ -40,7 +40,7 @@
 
     <properties>
 
-        <java.version>11</java.version>
+        <java.version>17</java.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <!-- to prevent message: system modules path not set in conjunction with -source 11 -->