Update 1900-12-18-more-about-josm_en.md
Update 1900-12-18-more-about-josm_en.md

In the Tour of JOSM paragraph the sentence "Above these buttons in the upper right" i changed into "in the upper left".
Nick-Tallguy/Nick-Tallguy.github.io,Nick-Tallguy/Nick-Tallguy.github.io,Nick-Tallguy/Nick-Tallguy.github.io,Nick-Tallguy/Nick-Tallguy.github.io,Nick-Tallguy/Nick-Tallguy.github.io