add team e-mail to authors

Author: japaric

Cargo.toml

@@ -1,5 +1,8 @@
 [package]
-authors = ["Jorge Aparicio <jorge@japaric.io>"]
+authors = [
+    "The Cortex-M Team <cortex-m@teams.rust-embedded.org>",
+    "Jorge Aparicio <jorge@japaric.io>",
+]
 categories = ["no-std"]
 description = "Log panic messages using the ITM (Instrumentation Trace Macrocell)"
 documentation = "https://rust-embedded.github.io/panic-itm/panic_itm"