x11-toolkits/pango: update to 1.50.4
Changelog:
- Tweak synthetic space sizes
- itemize: Try harder to avoid NULL fonts
- docs: Some additions
- Pass synthetic slant to harfbuzz
- Make sloped carets work with uneven scales
- Fix serialiation on arm
- Avoid an uninitialized variable warning
- Reinstate previous behavior of pango_attr_list_splice
- Deprecated pango_coverage_ref/unref
- Fix serialization on non-glibc systems
- Fix allow-breaks handling
PR: 261857
Exp-run by: antoine