François Pantigny submitted an update to the
nicematrix
package.
Version number: 6.20 2023-06-04 License type: lppl1.3
Summary description: Improve the typesetting of mathematical matrices with PGF
Announcement text: ----------------------------------------------------------------------
New key 'xdots/horizontal-labels': with that key, the labels of the continuous dotted lines (specified by, for example, Vdots^{...}) will stay horizontal. ----------------------------------------------------------------------
This package is located at https://mirrors.ctan.org/macros/latex/contrib/nicematrix
More information is at https://www.ctan.org/pkg/nicematrix
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Thanks for the upload.
For the CTAN Team Ina Dau