meta: Update JavadocIndexer and Java version

pom.xml

@@ -22,10 +22,7 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>3.10.1</version>
         <configuration>
-          <release>20</release>
-          <compilerArgs>
-            <compilerArg>--enable-preview</compilerArg>
-          </compilerArgs>
+          <release>22</release>
         </configuration>
       </plugin>
 
@@ -35,16 +32,11 @@
         <version>3.3.1</version>
         <configuration>
           <from>
-            <image>eclipse-temurin:20</image>
+            <image>eclipse-temurin:22</image>
           </from>
           <to>
             <image>i-al-istannen/doctor</image>
           </to>
-          <container>
-            <jvmFlags>
-              <jvmFlag>--enable-preview</jvmFlag>
-            </jvmFlags>
-          </container>
         </configuration>
       </plugin>
 
@@ -122,7 +114,7 @@
     <dependency>
       <groupId>com.github.I-Al-Istannen</groupId>
       <artifactId>JavadocIndexer</artifactId>
-      <version>8f39b2e9f8</version>
+      <version>737637adb06f</version>
     </dependency>
 
   </dependencies>