transition: quick-xml 0.36 -> 0.38

Because I uploaded citationberg (for typst), I looked into upgrading it and it requires quick-xml 0.38. Either I patch citationberg to continue using quick-xml 0.36, or I look into upgrading quick-xml to 0.38, which looks perhaps doable?

• atom-syndication. Latest release uses 0.37. Keep to version 0.12.6, importing upstream's patch to upgrade quick-xml to 0.38.
• bmap-parser. Latest release uses 0.31
• citationberg. Latest release uses 0.38. Update to 0.6.1 (no rdeps).
• grcov. Latest release uses 0.38. Update to 0.10.5 (no rdeps)
• gsettings-macro. Latest release uses 0.37
• gtk4-macros. Latest release uses 0.38
• gvdb. Latest release uses 0.38
• numbat-exchange-rates. Latest release uses 0.31
• opendal. Latest release uses 0.38
• plist. Latest release uses 0.38
• quick-junit. Latest release uses 0.37
• reqsign. Latest release uses 0.38
• rss. Latest release uses 0.37
• wayland-scanner. Latest release uses 0.37
• xcb. Latest release uses 0.30