Add link to vision spartan series presentation

Told people I'd put the link in this README.

Signed-off-by: milind-u <milind.upadhyay@gmail.com>
Change-Id: I380c993a9398c6158b2e1daecf53f62e5bcbd84c
diff --git a/y2022/vision/README.md b/y2022/vision/README.md
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+# [Spartan Series Vision Presentation](https://docs.google.com/presentation/d/1QJ-c5YYI_HC-rvaBSfPz1umMqL3TcKnja0nijyAlbVE/edit?usp=sharing)