Update duckdb index files

.gitattributes

@@ -84,3 +84,4 @@ Wikipedia[[:space:]](en)/partial-test/index.duckdb filter=lfs diff=lfs merge=lfs
 YoutubeSubtitles/partial-test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Enron[[:space:]]Emails/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Books3/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Pile-CC/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text

Pile-CC/partial-train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9f46fa8b7094a0e46773c23ea23c998ef8b869fab6d7d709444b07241f3fbada
+size 7262187520