Bump next from 14.2.10 to 14.2.15 in /playground #1825

Job	Run time
find_images_to_build	7s
build_image (modules/modeling/module_modeling_llm)	1m 4s
build_image (modules/programming/module_example)	1m 4s
build_image (modules/programming/module_programming_apted)	1m 7s
build_image (modules/programming/module_programming_llm)	1m 10s
build_image (modules/programming/module_programming_themisml)	1m 9s
build_image (modules/programming/module_programming_winnowing)	1m 6s
build_image (modules/text/module_text_cofee)	1m 11s
build_image (modules/text/module_text_llm)	1m 3s
build_image (assessment_module_manager)	1m 7s
build_image (llm_core)	1m 6s
build_image (log_viewer)	1m 8s
build_image (playground)	1m 7s
	13m 29s

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