Update actions/download-artifact action to v5

Author: renovate[bot]

.github/workflows/test-client.yaml

@@ -48,7 +48,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Download Generated Client
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
         with:
           name: example-${{ inputs.name }}-client
           path: ./
@@ -81,7 +81,7 @@ jobs:
           fetch-depth: 0 # Required due to the way Git works, without it this action won't be able to find any or the correct tags
       - run: git config --global --add safe.directory $GITHUB_WORKSPACE # Do this ourself because `actions/checkout@v3 doesn't succeed in doing this
       - name: Download Generated Client
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
         with:
           name: example-${{ inputs.name }}-client
           path: ./