Bump actions/download-artifact

Bumps the github_actions group with 1 update in the /.github/workflows directory: [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/download-artifact` from 3 to 4.1.7
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
  dependency-group: github_actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -232,7 +232,7 @@ jobs:
           pip install setuptools wheel twine auditwheel
 
       - name: Fetch library artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: library-${{ matrix.architecture }}
           path: wrappers/python/anoncreds/
@@ -320,7 +320,7 @@ jobs:
        github.event.inputs.publish-binaries == 'true'))
     steps:
       - name: Fetch libraries
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
       - run: |
           sudo mkdir ./libs
           sudo mv aarch64-linux-android   ./libs/arm64-v8a
@@ -386,7 +386,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Fetch static libraries
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
       - run: >
           ./build-xcframework.sh aarch64-apple-ios \
                                  aarch64-apple-ios-sim \
@@ -421,13 +421,13 @@ jobs:
 
     steps:
       - name: Fetch Android libraries
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: android-libraries
           path: mobile/android/
 
       - name: Fetch iOS Framework
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: anoncreds.xcframework
           path: mobile/ios/