assets/gen-regions.js: Reduce grid labels size
assets/gen-regions.js: Reduce grid labels size

Reduce the font size from 14px to 12px.

ChrisCummins/chriscummins.cc,ChrisCummins/chriscummins.github.io,ChrisCummins/chriscummins.cc,ChrisCummins/chriscummins.github.io,ChrisCummins/chriscummins.github.io,ChrisCummins/chriscummins.github.io,ChrisCummins/chriscummins.github.io,ChrisCummins/chriscummins.cc