Bump actions/cache from 5 to 6

.github/workflows/Code_Coverage.yml

@@ -51,7 +51,7 @@ jobs:
 
       # ── CPM cache ─────────────────────────────────────────────────────
       - name: Cache CPM packages
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.cache/cpm
           key: cpm-ubuntu-coverage-${{ hashFiles('**/CMakeLists.txt') }}

.github/workflows/benchmark.yml

@@ -44,7 +44,7 @@ jobs:
         # Build your program with the given configuration
         run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}} -j
       - name: Download previous benchmark data
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ./cache
           key: ${{ runner.os }}-benchmark

.github/workflows/benchmark_pr.yml

@@ -43,7 +43,7 @@ jobs:
         # Build your program with the given configuration
         run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}} -j
       - name: Download previous benchmark data
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ./cache
           key: ${{ runner.os }}-benchmark

.github/workflows/cmake.yml

@@ -430,7 +430,7 @@ jobs:
       # IMPORTANT: path must match CPM_SOURCE_CACHE exactly.
       # Tilde (~) is NOT safe here — use github.workspace for an absolute path.
       - name: Cache CPM packages
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ github.workspace }}/.cache/cpm
           key: cpm-${{ runner.os }}-${{ hashFiles('**/CMakeLists.txt') }}

.github/workflows/cmake_fedora.yml

@@ -549,7 +549,7 @@ jobs:
       # (which IS a JS action and works fine in containers), then configure
       # ccache via environment variables.
       - name: Restore ccache
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ github.workspace }}/.ccache
           key: ccache-fedora-${{ matrix.name }}-${{ github.sha }}
@@ -565,7 +565,7 @@ jobs:
       # ── CPM dependency cache ───────────────────────────────────────────────
       # Must use an absolute path — CMake's file(DOWNLOAD) never expands ~.
       - name: Restore CPM cache
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ github.workspace }}/.cache/cpm
           key: cpm-fedora-${{ matrix.name }}-${{ hashFiles('**/CMakeLists.txt') }}

.github/workflows/sanitizers.yml

@@ -154,7 +154,7 @@ jobs:
 
       # ── CPM cache ─────────────────────────────────────────────────────
       - name: Cache CPM packages
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.cache/cpm
           key: cpm-ubuntu-san-${{ hashFiles('**/CMakeLists.txt') }}

.github/workflows/static_analysis.yml

@@ -48,7 +48,7 @@ jobs:
         uses: seanmiddleditch/gha-setup-ninja@v6
 
       - name: Cache CPM packages
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.cache/cpm
           key: cpm-ubuntu-tidy-${{ hashFiles('**/CMakeLists.txt') }}