Update duckdb index files

.gitattributes

@@ -77,3 +77,4 @@ Burgers_Sols_Nu0.1/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 CFD_Rand_Eta0.01_Zeta0.01_periodic/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 CFD_Rand_Eta0.1_Zeta0.1_periodic/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 CFD_Rand_Eta1.e-8_Zeta1.e-8_periodic/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ReacDiff_Nu0.5_Rho1.0/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

ReacDiff_Nu0.5_Rho1.0/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4e5edbcd6055cd4021da46ef8e531ab1e22ebbc87a6ac9be7cf2497173af39da
+size 138948608