update gitignore

Author: wing328

.gitignore

@@ -283,4 +283,6 @@ samples/openapi3/client/petstore/go/privatekey.pem
 
 ## OCaml
 samples/client/petstore/ocaml/_build/
-/samples/client/jetbrains/adyen/checkout71/http/client/Apis/http-client.private.env.json
+
+# jetbrain http client
+samples/client/jetbrains/adyen/checkout71/http/client/Apis/http-client.private.env.json