Use angle brackets in windows resource files

Summary:
This is a follow up to PR11651.
Now that path are relative to src, the include in bitcoin-qt resource
file can also be simplified a bit.

Test Plan: Build for windows and check the build succeeds.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D3064