Fix broken link for 'Installing Devbox' (sidpalas#26)

Signed-off-by: Abolfazl Shahbazi <12436063+ashahba@users.noreply.github.com>

Author: ashahba

README.md

@@ -35,7 +35,7 @@ git clone --recurse-submodules git@github.com:sidpalas/devops-directive-github-a
 ```
 
 2. **Install DevBox** – DevBox bootstraps all required CLI tools (Go, Node.js, Python, `act`, `task`, `npc`, `civo`, `gh`, `jq`, `yq`, `kubectl`, `kluctl`, ...).  
-   Follow the official installation guide: <https://www.jetify.com/docs/devbox/installing_devbox/>
+   Follow the official installation guide: <https://www.jetify.com/docs/devbox/installing-devbox/index#>
 
    After installing devbox, run `devbox shell` to start a shell session with these tools installed/configured.