adding a new recipe on post training cr2 for driving captioning (#131)

* adding a new recipe on post training cr2 for driving captioning

* adding indices

* fixing linting

* tuning the presentation

* adjust width of the graph

* Update docs/recipes/post_training/reason2/video_caption_vqa/post_training.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update docs/recipes/post_training/reason2/video_caption_vqa/post_training.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>