Typo: Fix rpc arg in deploy_contract tutorial script

[Markeljan]

What was wrong?

How was it fixed?

Corrected from --rpc-url https://rpc.sepolia.org to --rpc-url http://localhost:8545 for local node example

To-Do

• [ ] OPTIONAL: Update Spec if applicable

• [ ] Add entry to the release notes (may forgo for trivial changes)

• [ ] Clean up commit history