Bump seanmiddleditch/gha-setup-ninja from 5 to 6

Bumps [seanmiddleditch/gha-setup-ninja](https://github.com/seanmiddleditch/gha-setup-ninja) from 5 to 6.
- [Release notes](https://github.com/seanmiddleditch/gha-setup-ninja/releases)
- [Commits](seanmiddleditch/gha-setup-ninja@v5...v6)

---
updated-dependencies:
- dependency-name: seanmiddleditch/gha-setup-ninja
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           ruby-version: 3.2
           bundler-cache: true
-      - uses: seanmiddleditch/gha-setup-ninja@v5
+      - uses: seanmiddleditch/gha-setup-ninja@v6
         with:
           version: 1.10.2
       - name: Install arm-none-eabi-gcc GNU Arm Embedded Toolchain