docs: fix callouts, wiki references, and improve hardware pages (#7204)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/index.md

@@ -1,12 +1,12 @@
 # EdgeTX Developer Documentation
 
-Welcome to the EdgeTX developer wiki!
+Welcome to the EdgeTX developer documentation!
 
 ![EdgeTX Logo](assets/images/EdgeTX_logo.png)
 
 EdgeTX is an open-source firmware for RC radio transmitters. This documentation covers technical topics for developers and contributors: how to build EdgeTX from source, hardware reference material, hardware modification guides, and internal software architecture.
 
-## What's in this wiki
+## What's in this documentation
 
 - **Contributing** — Getting started with Git, the GitHub workflow, and a command reference for common Git operations.
 - **Building EdgeTX** — Step-by-step build instructions for every supported platform (Linux, macOS, Windows, Docker, and GitHub CodeSpaces), plus a reference for all CMake compilation options.
@@ -22,5 +22,5 @@ EdgeTX is an open-source firmware for RC radio transmitters. This documentation
 | [Building — CodeSpaces](building/codespaces.md) | Build in a web browser with no local setup |
 | [Building — Linux (Ubuntu 24.04)](building/linux-ubuntu-24.04.md) | Recommended local build environment |
 | [Building — Windows](building/windows.md) | Native Windows build using Visual Studio + Ninja |
-| [Unbrick your radio](mods/unbrick.md) | Recover from a failed flash using STM32CubeProgrammer |
+| [Unbrick your radio](troubleshooting/unbrick.md) | Recover from a failed flash using STM32CubeProgrammer |
 | [Radio Specifications](hardware/radio-specs.md) | Hardware specs for supported radios |