fix: incorrect crate SPDX identifier, Apache-2.0

Signed-off-by: Harrison Saturley-Hall <hsaturleyhal@nvidia.com>

Author: saturley-hall

lib/async-openai/Cargo.toml

@@ -11,7 +11,7 @@
 [package]
 name = "dynamo-async-openai"
 description = "Fork of async-openai customized for Dynamo."
-license = "Apache 2.0 AND MIT"
+license = "Apache-2.0 AND MIT"
 version.workspace = true
 edition.workspace = true
 authors.workspace = true