Add team to front matter

Author: ecstatic-morse

posts/inside-rust/2019-11-23-const-if-match.md

@@ -2,6 +2,7 @@
 layout: post
 title: "`if` and `match` in constants on nightly rust"
 author: Dylan MacKenzie
+team: WG const-eval <https://github.com/rust-lang/const-eval>
 ---
 
 **TLDR; `if` and `match` are now usable in constants on the latest nightly.**