fix markdown link

[akkoma] / test / instance_static / emoji / pack_bad_sha / pack.json

{
    "pack": {
        "license": "Test license",
        "homepage": "https://pleroma.social",
        "description": "Test description",
        "can-download": true,
        "share-files": true,
        "download-sha256": "57482F30674FD3DE821FF48C81C00DA4D4AF1F300209253684ABA7075E5FC238"
    },
    "files": {
        "blank": "blank.png"
    }
}