Bump mistune from 3.1.3 to 3.2.0 in /test_package/nbconvert

Bumps [mistune](https://github.com/lepture/mistune) from 3.1.3 to 3.2.0.
- [Release notes](https://github.com/lepture/mistune/releases)
- [Changelog](https://github.com/lepture/mistune/blob/main/docs/changes.rst)
- [Commits](lepture/mistune@v3.1.3...v3.2.0)

---
updated-dependencies:
- dependency-name: mistune
  dependency-version: 3.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

test_package/nbconvert/env/darwin.txt

@@ -30,7 +30,7 @@ markupsafe==3.0.2
     # via
     #   jinja2
     #   nbconvert
-mistune==3.1.3
+mistune==3.2.0
     # via nbconvert
 nbclient==0.10.2
     # via nbconvert

test_package/nbconvert/env/linux.txt

@@ -30,7 +30,7 @@ markupsafe==3.0.2
     # via
     #   jinja2
     #   nbconvert
-mistune==3.1.3
+mistune==3.2.0
     # via nbconvert
 nbclient==0.10.2
     # via nbconvert

test_package/nbconvert/env/win32.txt

@@ -30,7 +30,7 @@ markupsafe==3.0.2
     # via
     #   jinja2
     #   nbconvert
-mistune==3.1.3
+mistune==3.2.0
     # via nbconvert
 nbclient==0.10.2
     # via nbconvert