Update 'README.md'

README.md

@@ -46,6 +46,7 @@ ___
 - [Nihon no Jisatsu](https://japantoday.com/category/features/kuchikomi/%27japan-has-no-future%27-is-a-widespread-if-not-universal-feeling)
 - [starlink](https://en.wikipedia.org/wiki/Starlink)
 - [starlink satellite map](https://satellitemap.space/?constellation=starlink)
+- [Plaza Accord](https://en.wikipedia.org/wiki/Plaza_Accord)
 
  
 ## [Mathematics and Theoretical Computer Science](mathematics.md)