chore(go): update version (#3578)

Author: apascal07

go/internal/version.go

@@ -18,6 +18,6 @@ package internal
 
 // Version is the current tagged release of this module.
 // That is, it should match the value of the latest `go/v*` git tag.
-const Version = "1.0.2"
+const Version = "1.0.3"
 
 const GENKIT_REFLECTION_API_SPEC_VERSION = 1