chore(deps): bump docker/setup-buildx-action from 3 to 4 (#2579)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/server.yml

@@ -226,7 +226,7 @@ jobs:
                   python-version: '3.13'
 
             - name: Set up Docker Buildx
-              uses: docker/setup-buildx-action@v3
+              uses: docker/setup-buildx-action@v4
 
             - name: Log in to GHCR
               uses: docker/login-action@v4
@@ -356,7 +356,7 @@ jobs:
                   echo "Using SHORT_SHA: $SHORT_SHA"
 
             - name: Set up Docker Buildx
-              uses: docker/setup-buildx-action@v3
+              uses: docker/setup-buildx-action@v4
 
             - name: Log in to GHCR
               uses: docker/login-action@v4