bump-pom-scijava.sh: really fix erroneous SCIFIO GAV

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Increase pom-scijava version to 1.51

The following changes were made:
	scifio.version = 0.3.0 (latest io.scif:scifio)

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>