Update duckdb index files

.gitattributes

@@ -178,3 +178,4 @@ tatoeba.hun/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tatoeba.ind/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tatoeba.ita/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tatoeba.jav/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+tatoeba.jpn/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

tatoeba.jpn/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a75d0a4e35a26fd34870abfb3e40ba817fac9f926a57765ee6ba7cfb986d90c4
+size 1060864