shepherd: ratspub: Update NLTK directory

shepherd/init.d/ratspub.scm

@@ -8,7 +8,7 @@
 		  ;#:directory (system* "/var/guix/profiles/per-user/shepherd/current-guix/bin/guix" "build" "ratspub") ; returns 0
 		  #:environment-variables
 		  (list "EDIRECT_PUBMED_MASTER=/export2/PubMed"
-			"NLTK_DATA=/export2/PubMed/nltk_data"
+			"NLTK_DATA=/home/hchen/nltk_data"
 			"PERL_LWP_SSL_CA_FILE=/etc/ssl/certs/ca-certificates.crt")
 		  #:log-file "/home/shepherd/logs/ratspub.log")
 	#:stop (make-kill-destructor)