Incorrect Documentation Link in install.sh script

[ziagham]

The documentation links in the /install/install.sh file currently point to incorrect URLs. They reference outdated or specific subpages instead of the updated main Getting Started and FlowCTL Installation sections.

Current URLs:

https://flowsynx.io/docs/getting-started/install-flowctl

https://flowsynx.io/docs/category/getting-started

Updated URLs:

Replace https://flowsynx.io/docs/getting-started/install-flowctl with https://flowsynx.io/docs/getting-started/flowctl-based-installation

Replace https://flowsynx.io/docs/category/getting-started with https://flowsynx.io/docs/getting-started/