Fix mis-scaled signals for subject 013: divide by 1e6 (part 8/33 of full fix for subjects 004,005,008-035,058-060).

sourcedata/braindecode/dataset.zarr/recording_13/data/c/0/0/0

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:ab018199df3ff9cba49f0445b35ec29ff518a623ef30bd7128c00e8c434c48b4
-size 18483637
+oid sha256:8372d54a3da0c5f1ff408ea00343a1944dadfc4b0b515516bc82b54d31112de2
+size 18481090

sourcedata/braindecode/dataset.zarr/recording_13/data/c/1/0/0

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:9b7b961237f34744c4e2417d99fffa81c7e6080545a31e7426d84229e8f7851d
-size 11553379
+oid sha256:f60d94f0183e737325fa8e3bb2a5705cf701db2f9f7ca4b4cc9d027847515611
+size 11551669