fix: open api package

Author: himank

openapiv3/annotations.proto

@@ -41,7 +41,7 @@ option java_package = "org.openapi_v3";
 option objc_class_prefix = "OAS";
 
 // The Go package name.
-option go_package = "github.com/google/gnostic/openapi;openapi_v3";
+option go_package = "github.com/google/gnostic/openapiv3;openapi_v3";
 
 extend google.protobuf.FileOptions {
   Document document = 1143;