build(deps): bump actions/cache from 5 to 6 in the github-actions group

Bumps the github-actions group with 1 update: [actions/cache](https://github.com/actions/cache).


Updates `actions/cache` from 5 to 6
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v5...v6)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/amd64_linux_cmake.yml

@@ -35,19 +35,19 @@ jobs:
 
       # CONFIGURING CACHES
       - name: Cache CMake dependency source code
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.deps_src_key}}-${{hashFiles('CMakeLists.txt', 'cmake/**')}}
           path: ${{github.workspace}}/build/_deps/*-src
       - name: Cache CMake dependency build
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.deps_build_key}}-${{hashFiles('CMakeLists.txt', 'cmake/**')}}
           path: |
             ${{github.workspace}}/build/_deps/*-build
             ${{github.workspace}}/build/_deps/*-subbuild
       - name: Cache CCache
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.ccache_key}}-${{github.sha}}
           restore-keys: |

.github/workflows/amd64_macos_cmake.yml

@@ -34,19 +34,19 @@ jobs:
 
       # CONFIGURING CACHES
       - name: Cache CMake dependency source code
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.deps_src_key}}-${{hashFiles('CMakeLists.txt', 'cmake/**')}}
           path: ${{github.workspace}}/build/_deps/*-src
       - name: Cache CMake dependency build
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.deps_build_key}}-${{hashFiles('CMakeLists.txt', 'cmake/**')}}
           path: |
             ${{github.workspace}}/build/_deps/*-build
             ${{github.workspace}}/build/_deps/*-subbuild
       - name: Cache CCache
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.ccache_key}}-${{github.sha}}
           restore-keys: |

.github/workflows/amd64_windows_cmake.yml

@@ -28,12 +28,12 @@ jobs:
 
       # CONFIGURING CACHES
       - name: Cache CMake dependency source code
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.deps_src_key}}-${{hashFiles('CMakeLists.txt', 'cmake/**')}}
           path: ${{github.workspace}}/build/_deps/*-src
       - name: Cache CMake dependency build
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.deps_build_key}}-${{hashFiles('CMakeLists.txt', 'cmake/**')}}
           path: |

.github/workflows/arm64_macos_cmake.yml

@@ -34,19 +34,19 @@ jobs:
 
       # CONFIGURING CACHES
       - name: Cache CMake dependency source code
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.deps_src_key}}-${{hashFiles('CMakeLists.txt', 'cmake/**')}}
           path: ${{github.workspace}}/build/_deps/*-src
       - name: Cache CMake dependency build
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.deps_build_key}}-${{hashFiles('CMakeLists.txt', 'cmake/**')}}
           path: |
             ${{github.workspace}}/build/_deps/*-build
             ${{github.workspace}}/build/_deps/*-subbuild
       - name: Cache CCache
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           key: ${{env.ccache_key}}-${{github.sha}}
           restore-keys: |