Update docker/setup-buildx-action digest to c47758b

Author: valtionavustus-renovate[bot]

.github/workflows/_deploy-env.yaml

@@ -51,7 +51,7 @@ jobs:
         with:
           platforms: 'arm64,arm'
 
-      - uses: docker/setup-buildx-action@8026d2bc3645ea78b0d2544766a1225eb5691f89 # v3
+      - uses: docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349 # v3
 
       - name: 05-deploy-cdk.sh
         id: deploy