Modify the web address of genesis.json in Readme.md

[gcake119]

Phase 1 of 3

get the genesis file

curl --fail https://gist.githubusercontent.com/davepuchyr/6bea7bf369064d118195e9b15ea08a0f/raw/genesis.json > config/genesis.json
sha256sum config/genesis.json | grep e20eb984b3a85eb3d2c76b94d1a30c4b3cfa47397d5da2ec60dca8bef6d40b17 && echo '✅ All good!' || echo "❌ BAD GENESIS FILE!"

[result]
BAD GENESIS FILE!

and caused connection issues when start starnamed.service

the file address should be:
https://gist.githubusercontent.com/davepuchyr/6bea7bf369064d118195e9b15ea08a0f/raw/cf66fd02ea9336bd79cbc47dd47dcd30aad7831c/genesis.json

Modified the code into:

get the genesis file

curl --fail https://gist.githubusercontent.com/davepuchyr/6bea7bf369064d118195e9b15ea08a0f/raw/cf66fd02ea9336bd79cbc47dd47dcd30aad7831c/genesis.json > config/genesis.json
sha256sum config/genesis.json | grep e20eb984b3a85eb3d2c76b94d1a30c4b3cfa47397d5da2ec60dca8bef6d40b17 && echo '✅ All good!' || echo "❌ BAD GENESIS FILE!"

[result]
All good!

the sync would be start smoothly