Fix version issue

Author: rpanackal

datamodel/openapi/openapi-api-apache-sample/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.sap.cloud.sdk.datamodel</groupId>
         <artifactId>openapi-parent</artifactId>
-        <version>5.25.0-SNAPSHOT</version>
+        <version>5.26.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>openapi-api-apache-sample</artifactId>