Bruno is altering response headers to lowercase when they shouldn't be

Issue

It appears that Bruno lowercases header names, even if the server is not sending it back that way. This could potentially break tests that are relying on testing for a header by name where the case does not match.

Steps to reproduce issue

Attempt a curl to a server and look at the headers. In my case, I will be looking for the 'Server' header on crapi.apisec.ai.

Notice how "Server" starts with a capital S.

Now do the same request in Bruno.

Notice how everything is now lowercase.

Expected behavior

The case should be preserved so existing tests that are looking for the case can continue to pass.