Merge topic 'update-expat'

2c97630dfa cmXMLParser: Avoid APIs deprecated by expat 2.9.0
218def4153 expat: Restore support for POSIX platforms older than 2008
c8b204d77f expat: Update CMake build for 2.9.0
a3cf5af54b Merge branch 'upstream-expat' into update-expat
de65220205 expat 2026-10-05 (a76b1174)
4aa7076e60 expat: Update script to get Expat 2.9.0
d668dd8e85 expat: Update CMake build for 2.8.5
eb0f5f4da8 Merge branch 'upstream-expat' into update-expat
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Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !12601