[wpiunits] Fix deprecation javadoc for units negate (#7436)

deprecated javadoc tags aren't inherited

wpiunits/src/generate/main/java/Measure-interface.java.jinja

@@ -43,6 +43,11 @@ public interface {{ helpers['type_decl'](name) }} extends Measure<{{ helpers['mt
     return ({{ helpers['type_usage'](name) }}) unit().ofBaseUnits(0 - baseUnitMagnitude());
   }
 
+  /**
+  * {@inheritDoc}
+  *
+  * @deprecated use unaryMinus() instead. This was renamed for consistency with other WPILib classes like Rotation2d
+  */
   @Override
   @Deprecated(since = "2025", forRemoval = true)
   @SuppressWarnings({"deprecation", "removal"})