Update parquet files

medhop_bigbio_qa/medhop-train.parquet

@@ -1,3 +1,3 @@
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+size 49036120

medhop_bigbio_qa/medhop-validation.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
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+size 8605423