Use the correct SPDX license short id

Cargo.toml

@@ -5,6 +5,7 @@ authors = ["Thomas Daede <tdaede@xiph.org>"]
 edition = "2018"
 build = "build.rs"
 include = ["/src/**", "/Cargo.toml", "/build.rs"]
+license = "BSD-2-Clause"
 autobenches = false
 autobins = false
 

ivf/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 authors = ["Thomas Daede <tdaede@xiph.org>"]
 edition = "2018"
 description = "Simple ivf muxer"
-license = "BSD-2"
+license = "BSD-2-Clause"
 homepage = "https://github.com/xiph/rav1e"
 
 [dependencies]