Update bencher README with torrust tracker commit

[josecelano]

Update the Bencher README with the latest Torrust Tracker commit compatible with this benchmarking configuration.

How to install the Torrust Tracker to run the benchmarking:

git clone [email protected]:torrust/torrust-tracker.git
cd torrust-tracker
git checkout eaa86a76fc2bca837172e0e5c0221ee14b16b122
cargo build --release
sudo cp ./target/release/torrust-tracker /usr/local/bin/
sudo chmod +x /usr/local/bin/torrust-tracker

How to test the configuration:

TORRUST_TRACKER_CONFIG_TOML=$(cat << EOF
            [metadata]
            schema_version = "2.0.0"

            [logging]
            threshold = "error"

            [core]
            listed = false
            private = false
            tracker_usage_statistics = false

            [core.database]
            driver = "sqlite3"
            path = "./sqlite3.db"

            [core.tracker_policy]
            persistent_torrent_completed_stat = false
            remove_peerless_torrents = false

            [[udp_trackers]]
            bind_address = "0.0.0.0:3000"
EOF
) torrust-tracker

[greatest-ape]

Thanks!