fix SD image CI: use find -L to follow symlinks in Nix store

The built image is a symlink in the Nix store. find with -type f
skips symlinks, causing 'No image found' error.

.forgejo/workflows/deploy.yml

@@ -46,7 +46,7 @@ jobs:
             --extra-platforms aarch64-linux \
             --out-link result-${{ matrix.host }}
 
-          IMAGE_PATH=$(find result-${{ matrix.host }} -name "*.img.zst" -type f | head -1)
+          IMAGE_PATH=$(find -L result-${{ matrix.host }} -name "*.img.zst" | head -1)
           if [ -z "$IMAGE_PATH" ]; then
             echo "Error: No image found!"
             exit 1