ci: Bump GitHub Actions to Node.js 24-compatible versions

- actions/checkout v4 -> v6
- actions/upload-artifact v4 -> v7
- actions/download-artifact v4 -> v8
- actions/setup-node v4 -> v6
- node-version 20 -> 22

Author: lutter

.github/workflows/gnd-binary-build.yml

@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install Rust toolchain
         run: |
@@ -109,7 +109,7 @@ jobs:
           7z a -tzip ${{ matrix.asset_name }}.zip ${{ matrix.asset_name }}
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: ${{ matrix.asset_name }}
           path: |
@@ -124,7 +124,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup GitHub CLI
         run: |
@@ -134,7 +134,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Download all artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           path: artifacts
 
@@ -201,9 +201,9 @@ jobs:
             cpu_field: x64
             extract: unzip
     steps:
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
-          node-version: 20
+          node-version: 22
           registry-url: https://registry.npmjs.org
 
       - name: Download gnd binary