Apply suggestions from code review

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: SeppoTakalo

.github/copilot-instructions.md

@@ -54,8 +54,8 @@ west build -b nrf9151dk/nrf9151/ns app
 - **Always** use the `/ns` (non-secure) board target — TF-M is required. Omitting `/ns` causes a build failure.
 - The board target `nrf9151dk/nrf9151/ns` is the primary and mandatory target.
 - The secondary supported target is `thingy91x/nrf9151/ns`.
-- Sysbuild is enabled by default (`sysbuild.conf` at repo root); the build produces MCUBoot + app images.
-- Build output lands in `app/build/`.
+- Sysbuild is enabled by default (`app/sysbuild.conf`); the build produces MCUBoot + app images.
+- With the command above run from the repository root, build output lands in `build/` unless `-d` is used.
 
 ### Clean (pristine) build
 

.github/instructions/DOC.instructions.md

@@ -14,7 +14,7 @@ Reference: [Nordic Tech Docs Style Guide](https://nordicplayground.github.io/tec
 - Maintain consistent formatting and structure
 - Use American English spelling (reference: [Merriam-Webster](https://www.merriam-webster.com/))
 - Use present tense
-- Use active voice; passive voice is acceptable only when the system performs the action, the receiver of the action should be emphasised, or the passive form is clearer
+- Use active voice; passive voice is acceptable only when the system performs the action, the receiver of the action should be emphasized, or the passive form is clearer
 - Use gender-neutral language
 - Keep sentences short; use subject + verb + object order
 - Use lists where appropriate
@@ -42,7 +42,7 @@ Reference: [Nordic Tech Docs Style Guide](https://nordicplayground.github.io/tec
 - Use the SVG Diagram Guidelines (below) when creating new figures
 
 ## File Templates
-- For new documentation files, use nRF template: [templates.rst](nrf/doc/nrf/dev_model_and_contributions/documentation/templates.rst)
+- For new documentation files, use nRF template: [templates.rst](https://github.com/nrfconnect/sdk-nrf/blob/main/doc/nrf/dev_model_and_contributions/documentation/templates.rst)
 - Follow established documentation patterns
 - Include proper metadata and headers