Use Summer 2026 SNAPSHOT version of Koans library.

Author: DavidWhitlock

projects-parent/archetypes-parent/java-koans-archetype/src/main/resources/archetype-resources/pom.xml

@@ -50,7 +50,7 @@
     <dependency>
       <groupId>io.github.davidwhitlock.joy.com.sandwich</groupId>
       <artifactId>koans-lib</artifactId>
-      <version>1.2.3</version>
+      <version>1.2.4-SNAPSHOT</version>
     </dependency>
   </dependencies>
   <properties>