Update 'politics.md'

politics.md

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 ## Reading List
 - [Missing middle housing](https://en.wikipedia.org/wiki/Missing_middle_housing) 
 - [1953 Iranian coup d'état](https://en.wikipedia.org/wiki/1953_Iranian_coup_d'état)
+- [House of Commons Floor plan](https://www.ourcommons.ca/members/en/floorplan)
 
 # Politics
 - [NATO](https://en.wikipedia.org/wiki/NATO)