textproc/py-mkdocs-include-markdown-plugin: Update 7.1.6 => 7.1.7

Changelog:

• Fix passing negative values to heading-offset argument of include-markdown directive.

https://github.com/mondeja/mkdocs-include-markdown-plugin/releases/tag/v7.1.7

PR: 289247
MFH: 2025Q3
(cherry picked from commit 3587fbd0fe60b414c986ade739d2a41f5548b917)