Proposed changes

Fixed typo in usage (PROXY > -hp flag)

before

PROXY:
   -hp, -http-proxy string[]    Upstream HTTP Proxies (eg http://proxy-ip:proxy-port

after

PROXY:
   -hp, -http-proxy string[]    Upstream HTTP Proxies (eg http://proxy-ip:proxy-port)

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)