Fix publish errors

Author: zaphar

Diff for: Cargo.toml

@@ -2,7 +2,7 @@
 name = "tower-trace-metrics"
 version = "0.1.0"
 edition = "2021"
-license = "Apache 2.0"
+license = "Apache-2.0"
 author = "Jeremy Wall <[email protected]"
 description = "A tower-http TraceLayer that records metrics per request"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html