add griffe requirements

docs/requirements.txt

@@ -7,4 +7,5 @@ mkdocs-literate-nav==0.5.0
 mkdocs-redirects==1.2.0
 mkdocs-jupyter==0.16.0
 mkdocs-gen-files==0.4.0
-jupyter
\ No newline at end of file
+griffe==0.27.1
+jupyter