Fix graph tests

[gabrielfior]

Without warning the errors for the OmenThumbnail graph are failing intermitently, see
https://github.com/gnosis/labs-contracts/actions/runs/12400598603/job/34618885118

error

graph test -l -f
  shell: /usr/bin/bash -e {0}
  
Fetching latest version tag...
OS type: Ubuntu
OS arch: x64
OS release: 22.04.5 LTS (Jammy Jellyfish)
OS major version: 22
CPU model: AMD EPYC 776[3](https://github.com/gnosis/labs-contracts/actions/runs/12400598603/job/34618885118#step:5:3) 64-Core Processor
Download link: https://github.com/LimeChain/matchstick/releases/download/0.[6](https://github.com/gnosis/labs-contracts/actions/runs/12400598603/job/34618885118#step:5:7).0/binary-linux-22
Downloading release from https://github.com/LimeChain/matchstick/releases/download/0.6.0/binary-linux-22
Error fetching release: TAR_BAD_ARCHIVE: Unrecognized archive format