Fix mis-scaled signals for subject 012: divide by 1e6 (part 7/33 of full fix for subjects 004,005,008-035,058-060).

sourcedata/braindecode/dataset.zarr/recording_12/data/c/0/0/0

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:ede2e82796fe2ddac9cf6737ec1ffb4d66c0a2631c08daa823a91abe09dd37b9
-size 18460959
+oid sha256:dd2d01c42483e72c97dce2a7e0e0dbd6fdc1be171783376ac28ecad5a1a12996
+size 18456785

sourcedata/braindecode/dataset.zarr/recording_12/data/c/1/0/0

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:0f0e51687a7ec25ac7eaded24d96367e5b019c2f47f90e42f54a1b17ddfa6bd7
-size 11553197
+oid sha256:7beaf731ad8f86a279124d01624302ded8b71f975ef3e247f9e1d4ed4d23679e
+size 11551884