chore(deps): bump actions/download-artifact from 4 to 6

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v6)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/test-and-build.yaml

@@ -155,7 +155,7 @@ jobs:
         with:
           melos-version: "6.3.2"
       - name: Download Build Artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: ${{ runner.os }}-build-artifact
       - name: "Run build for Android"
@@ -200,7 +200,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pods-
       - name: Download Build Artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: ${{ runner.os }}-build-artifact
       - name: Select XCode 16.4
@@ -264,7 +264,7 @@ jobs:
           channel: "stable"
           cache: true
       - name: Download Build Artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: ${{ runner.os }}-build-artifact
       - name: Cache pub global packages
@@ -358,7 +358,7 @@ jobs:
           # Save DEVICE_ID for later use
           echo "DEVICE_ID=$DEVICE_ID" >> $GITHUB_ENV
       - name: Download Build Artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: ${{ runner.os }}-build-artifact
       - name: Cache podfiles