CTAN update: l3backend-dev

The LaTeX Project Team submitted an update to the l3backend-dev package. Version number: 2025-03-10 License type: lppl1.3c Summary description: LaTeX3 backend drivers (dev) Announcement text:

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## [2025-03-10] ### Added - Support for canvas shifts ### Changed - Move PDF annotation functions to `pdfannot` module

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This package is located at https://mirrors.ctan.org/macros/latex-dev/required/l3backend More information is at https://www.ctan.org/pkg/l3backend-dev

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Thanks for the upload. For the CTAN Team Erik Braun

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