Fixes infinite loop when rendering Ipynb Diffs

Why

Upgrades ipynbdiff gem to 0.4.5, fixing edge cases introduced in version 0.4.4 (gitlab-org/incubation-engineering/mlops/rb-ipynbdiff#9 (closed))

Diff for the update: gitlab-org/incubation-engineering/mlops/rb-ipynbdiff@0f6d2fe8.diff (note we can't use gitlab UI to display this diff because of the bug this MR fixes)

Debug file: array-png.ipynb

How to test

1. Create a repository and add the offending file:

   mkdir outage_notebook
   cd outage_notebook
   curl incubation-engineering/mlops/rb-ipynbdiff/uploads/9c1f006ed70185d2029bc3d00b03574f/iterate.ipynb -o iterate.ipynb
   git init -b main
   git add -A 
   git commit -am "Adding offending notebook"
   git remote add origin <your local repository>
   git push --upstream origin main

2. Enable the feature flags

   Feature.enable(:ipynb_semantic_diff)
   Feature.enable(:rendered_diffs_viewer)

3. Restart GDK and open the commit

4. Without the changes, opening the commit will cause gitlab to 500

5. With the changes, the transformed diff is shown