Update Deploy & Run Proxy Contract

[davidekete]

@davidekete

[ryestew]

the run.md page should be updated at the top:
currently it has this list:

1. Deploying a contract
2. Accessing an onchain contract
3. Interacting with the functions of a deployed contract

It should be updated to:

1. Deploying a contract
2. Accessing an onchain contract
3. Forking a chain
4. Interacting with the functions of a deployed contract

[davidekete]

the run.md page should be updated at the top: currently it has this list:

1. Deploying a contract
2. Accessing an onchain contract
3. Interacting with the functions of a deployed contract

It should be updated to:

1. Deploying a contract
2. Accessing an onchain contract
3. Forking a chain
4. Interacting with the functions of a deployed contract

There's no "Interacting with the functions of a deployed contract" in run.md, but I updated the order so that Forking a Chain comes before "Supported environments" instead of after