Update duckdb index files

.gitattributes

@@ -394,3 +394,4 @@ HuggingFaceGECLM--StackExchange_Mar2023/mathematica/index.duckdb filter=lfs diff
 HuggingFaceGECLM--StackExchange_Mar2023/meta.stackexchange/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/3dprinting.meta/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/3dprinting/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/academia.meta/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/academia.meta/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d8a04d4b3e018e367238931ad0c385f01c691376ab3c846afad346c43c68ae15
+size 14692352