fix security in workflow

Author: CoastEgo

docs/requirements.txt

@@ -7,9 +7,8 @@ mkdocstrings[python]
 mknotebooks==0.8.0       # Turn Jupyter Lab notebooks into webpages.
 pytkdocs_tweaks==0.0.8   # Tweaks mkdocstrings to improve various aspects
 mkdocs_include_exclude_files==0.0.1  # Allow for customising which files get included
-jinja2==3.0.3            # Older version. After 3.1.0 seems to be incompatible with current versions of mkdocstrings.
-nbconvert==6.5.0         # | Older verson to avoid error
-nbformat==5.4.0          # |
+nbconvert==7.16.4
+nbformat==5.10.4
 
 mkdocs-autorefs==1.2.0
 mkdocs-material-extensions==1.3.1