MAINT: Bump the docs-deps group with 1 update (#790)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pyproject.toml

@@ -74,7 +74,7 @@ doc = [
     "jupyter_sphinx==0.4.0",
     "jupytext==1.15.2",
     "myst-parser==2.0.0",
-    "nbconvert==7.8.0",
+    "nbconvert==7.9.0",
     "nbsphinx==0.9.3",
     "notebook==7.0.4",
     "numpydoc==1.6.0",