revert: java language level to 11

Author: nnnnoel

java/java.iml

@@ -3,7 +3,7 @@
   <component name="ModuleRunConfigurationManager">
     <shared />
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_17">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_11">
     <output url="file://$MODULE_DIR$/build/production" />
     <output-test url="file://$MODULE_DIR$/build/test" />
     <exclude-output />