`Development`: Update nltk to 3.9.1 and langchain-community to 0.2.15 #1800

Job	Run time
find_images_to_build	11s
build_image (modules/modeling/module_modeling_llm)	2m 11s
build_image (modules/programming/module_example)	2m 12s
build_image (modules/programming/module_programming_apted)	2m 21s
build_image (modules/programming/module_programming_llm)	2m 18s
build_image (modules/programming/module_programming_themisml)	4m 8s
build_image (modules/programming/module_programming_winnowing)	2m 53s
build_image (modules/text/module_text_cofee)	2m 38s
build_image (modules/text/module_text_llm)	2m 34s
build_image (assessment_module_manager)	2m 31s
build_image (llm_core)	2m 11s
build_image (log_viewer)	1m 45s
build_image (playground)	4m 36s
	32m 29s

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