bump-pom-scijava: deploy the pom-scijava after modifying it

... not scijava-common...

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
bump-pom-scijava: fix inverted logic again

We *want* pom.xml to differ from pom.xml.new after increasing the
version number...

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
bump-pom-scijava: fix the commit message

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