Update docker/setup-buildx-action action to v4 (#63)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/image-build.yml

@@ -16,7 +16,7 @@ jobs:
       uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
+      uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
 
     - name: Build Docker image
       uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
+        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
 
       - name: Log in to GitHub Container Registry
         uses: docker/login-action@v184bdaa0721073962dff0199f1fb9940f07167d1 # v3.5.0