Bump mkdocs-material from 9.1.17 to 9.1.21 (#389)

diff --git a/requirements.txt b/requirements.txt
index be3d1546817dff6ab0111f9281367adcda4d07e5..4b06c74ba9c92221e81361fe22dd989f5e0efd5d 100644 (file)
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,5 @@ Markdown==3.3.7
 mike==1.1.2
 mkdocs-git-revision-date-plugin==0.3.2
 mkdocs-macros-plugin==1.0.2 
-mkdocs-material==9.1.17
+mkdocs-material==9.1.21
 mkdocs==1.5.1