Java api property name

Klausuren/pom.xml.reference

@@ -18,7 +18,7 @@
         <maven.compiler.source>17</maven.compiler.source>
 
         <freedocs.url>https://freedocs.mi.hdm-stuttgart.de</freedocs.url>
-        <jdk.api_17.url>${freedocs.url}/doc/openjdk-21-doc/api/</jdk.api_17.url>
+        <jdk.api_21.url>${freedocs.url}/doc/openjdk-21-doc/api/</jdk.api_21.url>
         <mathjax.url>${freedocs.url}/lib/MathJax/es5/tex-chtml.js</mathjax.url>
         <libhighlight.url>${freedocs.url}/lib/highlight.js</libhighlight.url>
     </properties>
@@ -65,7 +65,7 @@
                     <javaApiLinks>
                         <property>
                             <name>api_11</name>
-                            <value>${jdk.api_17.url}</value>
+                            <value>${jdk.api_21.url}</value>
                         </property>
                     </javaApiLinks>