chore(deps): update dependency nbformat to v5.9.2

Author: renovate[bot]

requirements.txt

@@ -53,7 +53,7 @@ mistune==3.0.1
 nbclassic==1.0.0
 nbclient==0.8.0
 nbconvert==7.5.0
-nbformat==5.9.0
+nbformat==5.9.2
 nest-asyncio==1.5.6
 notebook==6.5.4
 notebook_shim==0.2.3