Update proposals.md (w3c#7913)

Co-authored-by: Tab Atkins Jr <jackalmage@gmail.com>

Author: sesse

css-nesting-1/proposals.md

@@ -148,6 +148,7 @@ If it were up to you, what syntax would you prefer for CSS Nesting?
 | dbaron | 3 [*](https://github.com/w3c/csswg-drafts/issues/7834#issuecomment-1283019419) | 4.iii | 1 |
 | alohci      | 3          | 1          | 4          |
 | svgeesus    | 3          | 2.iii      |            |
+| sesse       | 1          | 3          |            |	
 | lilles      | 1          | 3          |            |
 | andruud     | 3          | 1          | 4          |