graphics/zathura: Update 0.5.12 => 0.5.13

Changelog:
https://pwmt.org/projects/zathura/changelog/0.5.13/index.html

• Remove USES=ninja because it is implicit in USES=meson.
• Revert replace USES=gettext with USES=gettext-runtime gettext-tools (my change in previous commit) - it was unnecessary change.

PR: 289825