fix(BK-2020-04-PID-1):Fix minor title placements

- Note: Title text placements were adjusted in order to accomodate
  Wikimedia Commons' PNG rendering process which lacks the font used by
  the drawings (i.e. `osifont`); text when rendered by WikiCommons
  expands in width by about 25% when it uses its default sans serif
  font in lieu of `osifont`.
- Note: `REVISIONS.org` was also updated in an earlier commit to
  reflect the 2023-03-01 date when the drawings were substantially
  updated. Today's (2023-05-23) updates are not recorded and the
  revision letters were not incremented since the changes were minor
  title placement changes.
- Note: `EXEC/combine_pdfs.sh` was added in an earlier commit. It is a simple
  BK-2020-03 Bash script (see
  https://gitlab.com/baltakatei/baltakatei-exdev ) that automates
  calling `pdftk` to combine PDFs into a single PDF.