[docker] Fixes hub dockerfile for online project (OpenAPITools#914)

An update was made in OpenAPITools#876 to remove version from the generated artifact
for openapi-generator-online. The change is missing the -online suffix.
My original glob pattern put the * in the wrong place for
maintainability.

Author: jimschubert

.hub.online.dockerfile

@@ -26,7 +26,7 @@ RUN mkdir -p ${TARGET_DIR}
 
 WORKDIR ${TARGET_DIR}
 
-COPY --from=builder ${GEN_DIR}/modules/openapi-generator-online/target/openapi-generator.jar ${TARGET_DIR}/openapi-generator-online.jar
+COPY --from=builder ${GEN_DIR}/modules/openapi-generator-online/target/openapi-generator-online.jar ${TARGET_DIR}/openapi-generator-online.jar
 
 ENV GENERATOR_HOST=http://localhost