chore: [Grounding] enabled test (#638)

Author: CharlesDuboisSAP

sample-code/spring-app/src/test/java/com/sap/ai/sdk/app/controllers/GroundingTest.java

@@ -16,7 +16,6 @@
 import java.time.format.TextStyle;
 import java.util.Locale;
 import java.util.UUID;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 class GroundingTest {
@@ -52,7 +51,6 @@ void testRepositoriesGetAll() {
   }
 
   @Test
-  @Disabled("Temporary disabled because of an unresolved minor bug") // SAP/ai-sdk-java-backlog#232
   void testCreateDeleteCollection() {
     final var controller = new GroundingController();