chore(CI): bump action versions

.github/workflows/macos.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Install Qt
       uses: jurplel/install-qt-action@v4
       with:
-        version: '6.11.2'
+        version: '6.12.0'
         modules: 'qtimageformats'
         cache: true
     - name: Install Conan and Dependencies

.github/workflows/reuse-check.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps: 
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: REUSE Compliance Check
       uses: fsfe/reuse-action@v5

.github/workflows/windows.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - qt_ver: '6.11.2'
+          - qt_ver: '6.12.0'
             vs: '2022'
             aqt_arch: 'win64_msvc2022_64'
             msvc_arch: 'x64'
@@ -47,7 +47,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - qt_ver: '6.11.2'
+          - qt_ver: '6.12.0'
             vs: '2022'
             aqt_arch: 'win64_msvc2022_64'
             msvc_arch: 'x64'