Assigned RUSTSEC-2020-0069 to lettre (#481)

Co-authored-by: tarcieri <[email protected]>

Author: github-actions[bot]

crates/lettre/RUSTSEC-0000-0000.md renamed to crates/lettre/RUSTSEC-2020-0069.md

@@ -1,6 +1,6 @@
 ```toml
 [advisory]
-id = "RUSTSEC-0000-0000"
+id = "RUSTSEC-2020-0069"
 package = "lettre"
 date = "2020-11-11"
 url = "https://github.com/lettre/lettre/pull/508/commits/bbe7cc5381c5380b54fb8bbb4f77a3725917ff0b"