chore: set version to 4.5.1 (#16707)

## Description

Bump the version number so next patch release has the proper version

## Testing

None

## Risks

None

Author: gnufede

pyproject.toml

@@ -9,7 +9,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "ddtrace"
-version = "4.5.0"
+version = "4.5.1"
 description = "Datadog APM client library"
 readme = "README.md"
 license = { text = "LICENSE.BSD3" }