Lesson3 some nitpicks still needed to lesson content:

## Lesson3 some nitpicks still needed to lesson content:
Changes (needed) and some observations before I forget
- [x] Some changes need to be done regarding the breaking changes from new upgrades of ethers.js and Hardhat Toolbox dependencies
- [ ] Might be a good idea to add two more MATIC faucet possibilities (some 'suppliers' are expecting real ETH in a dev's wallet to avoid spam - the joys of inclusivity)
- [ ] should add a mention about different handling of baseURI in comparison to lesson2
- [ ] should also mention explicitly that we handle env variables differently to lesson2 and why.
- [ ] should add something about the nature of import/require statements in the scripts files (need to check lesson2 for how that was described)
- [ ] in the very last Checkpoint question, a 'correct [true] answer' states that `.env` files 'ensures easy collaboration among devs' - is that correct?
- [ ] Q4 and Q5 are pretty much the same in the final quiz.