Update duckdb index files

.gitattributes

@@ -70,3 +70,4 @@ MikhailT--cmu-arctic/jmk/index.duckdb filter=lfs diff=lfs merge=lfs -text
 MikhailT--cmu-arctic/ksp/index.duckdb filter=lfs diff=lfs merge=lfs -text
 MikhailT--cmu-arctic/rms/index.duckdb filter=lfs diff=lfs merge=lfs -text
 MikhailT--cmu-arctic/lnh/index.duckdb filter=lfs diff=lfs merge=lfs -text
+MikhailT--cmu-arctic/slt/index.duckdb filter=lfs diff=lfs merge=lfs -text

MikhailT--cmu-arctic/slt/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d9b1b7acf21ed770f6f28a9019733fa518a0f17b6ec470cb1872bda4801a692b
+size 263204864