`Development`: Update nltk to 3.9.1 and langchain-community to 0.2.15 #127

Job	Run time
get-labels	3s
check-build-status	6s
filter-matrix (athena-test1.ase.cit.tum.de, athena-test1, https://athena-test1.ase.cit.tum.de, de...	1s
filter-matrix (athena-test2.ase.cit.tum.de, athena-test2, https://athena-test2.ase.cit.tum.de, de...	1s
process-matrix	1s
deploy (athena-test2.ase.cit.tum.de, athena-test2, https://athena-test2.ase.cit.tum.de, deployer,...	3m 45s
add-error-label	0s
	3m 57s

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