Update dependency nbconvert to v7.16.6

Author: renovate[bot]

Pipfile

@@ -12,7 +12,7 @@ jupyterlite-core = {extras = ["all"], version = "==0.1.3"}
 jupyterlite-pyodide-kernel = "==0.1.3"
 mkdocs = {version = "==1.5.3", extras = ["i18n"]}
 mkdocs-material = "==9.5.3"
-nbconvert = "==7.16.2"
+nbconvert = "==7.16.6"
 
 [requires]
 python_version = "3.10"