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-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/Code_Coverage.yml

@@ -47,7 +47,7 @@ jobs:
             gcc-14 g++-14 lcov gcovr ninja-build
 
       - name: Install Ninja
-        uses: seanmiddleditch/gha-setup-ninja@v5
+        uses: seanmiddleditch/gha-setup-ninja@v6
 
       # ── CPM cache ─────────────────────────────────────────────────────
       - name: Cache CPM packages

.github/workflows/cmake.yml

@@ -416,7 +416,7 @@ jobs:
 
       # ── Ninja (all platforms) ─────────────────────────────────────────
       - name: Install Ninja
-        uses: seanmiddleditch/gha-setup-ninja@v5
+        uses: seanmiddleditch/gha-setup-ninja@v6
 
       # ── ccache ────────────────────────────────────────────────────────
       - name: Set up ccache

.github/workflows/sanitizers.yml

@@ -150,7 +150,7 @@ jobs:
             ${{ matrix.compiler }} ${{ matrix.cxx }}
 
       - name: Install Ninja
-        uses: seanmiddleditch/gha-setup-ninja@v5
+        uses: seanmiddleditch/gha-setup-ninja@v6
 
       # ── CPM cache ─────────────────────────────────────────────────────
       - name: Cache CPM packages

.github/workflows/static_analysis.yml

@@ -45,7 +45,7 @@ jobs:
             /usr/bin/clang-tidy clang-tidy /usr/bin/clang-tidy-18 100
 
       - name: Install Ninja
-        uses: seanmiddleditch/gha-setup-ninja@v5
+        uses: seanmiddleditch/gha-setup-ninja@v6
 
       - name: Cache CPM packages
         uses: actions/cache@v4