update github actions (#49)

.github/dependabot.yml

@@ -0,0 +1,8 @@
+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every week
+      interval: "weekly"

.github/workflows/c-cpp.yml

@@ -27,21 +27,21 @@ jobs:
       VCPKG_ROOT: ${{ github.workspace }}/vcpkg
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         submodules: true
 
     - uses: lukka/get-cmake@latest
 
     - name: Clone vcpkg
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         repository: microsoft/vcpkg
         path: ${{ env.VCPKG_ROOT }}
         submodules: true
 
     - name: Restore vcpkg and its artifacts
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         # The first path is where vcpkg generates artifacts while consuming the vcpkg.json manifest file.
         # The second path is the location of vcpkg (it contains the vcpkg executable and data files).
@@ -73,7 +73,7 @@ jobs:
       run: cmake --build "${{env.CMAKE_BUILD_DIR}}" --config Release --target "${{ matrix.target }}" -j 6 --
 
     - name: Upload a build artifact
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         # Artifact name
         name: slimevr-openvr-driver-${{ matrix.triplet }} # optional, default is artifact
@@ -88,7 +88,7 @@ jobs:
       run: cmake -E tar "cf" "${{env.CMAKE_BUILD_DIR}}/slimevr-openvr-driver-${{ matrix.triplet }}.zip" --format=zip -- ${{env.CMAKE_BUILD_DIR}}/${{ matrix.release_dir }}/slimevr
 
     - name: Release
-      uses: softprops/action-gh-release@v1
+      uses: softprops/action-gh-release@v2
       if: startsWith(github.ref, 'refs/tags/')
       with:
         files: "${{env.CMAKE_BUILD_DIR}}/slimevr-openvr-driver-${{ matrix.triplet }}.zip"