Downgrade target Java version to 17

Author: steve-s

pom.xml

@@ -173,9 +173,9 @@
           <artifactId>maven-compiler-plugin</artifactId>
           <version>3.14.0</version>
           <configuration>
-            <source>21</source>
-            <target>21</target>
-            <release>21</release>
+            <source>17</source>
+            <target>17</target>
+            <release>17</release>
             <compilerArgs>
               <arg>-Xlint:all</arg>
               <arg>-Werror</arg>