while here:
* no longer pin-point the version of go we use to build it;
* add '-extldflags "-static"' to GO_BUILDFLAGS;

changes and full diff between versions:
* https://github.com/cloudflare/cloudflared/blob/2023.8.0/CHANGES.md
* https://github.com/cloudflare/cloudflared/compare/2023.2.1...2023.8.0