Update dependency mkdocs-material to v9.6.7

requirements.txt

 mkdocs==1.6.1
 pymdown-extensions>=10.0
 mkdocs-material-extensions==1.3.1
-mkdocs-material==9.6.5
+mkdocs-material==9.6.7
 mkdocs-glightbox>=0.3.4
 mkdocs-video==1.5.0
-mkdocs-material[imaging]==9.6.5
+mkdocs-material[imaging]==9.6.7
 mkdocs-rss-plugin==1.17.1
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