[Enhancement]: CCIP Transfer Tutorial Reverts If Fee Increases Fix

[MarcusWentz]

What would you like us to improve?

Reference document:
https://docs.chain.link/ccip/tutorials/cross-chain-tokens#transfer-tokens-and-pay-in-link

New users might get stuck if they see the CCIP token transfer will fail, even though the tutorial asks for just 0.01 LINK.

I opened a pull request to give the user a warning to increase the LINK balance for TokenTransferor.sol since the fee increased.

How important it is?

Helps debug the CCIP token transfer tutorial.

[MarcusWentz]

Proposed fix in:

#1408