Replace CreateToken call in demo-rollup/README.md with a transfer

[neysofu]

Summary

The README.md in demo-rollup is not very clear on how to run the example CreateToken transaction right after make test-create-token.

• If one tries to run it without make clean, the transaction is invalid because the same token was just created. Overall not a good UX.
• If one tries to run it after running make clean, the transaction is also invalid because the example is using nonce=1.

Expected Result

We want the demo-rollup README to function correctly for all users and be hard to mess up.
After some discussion, we agreed on replacing the CreateToken call with a transfer as to work correctly after make test-create-token without any issues.