Fix link to YEL calculator

[omidmaldar]

This pr

• Fixes the target of link to YEL calculator. The existing one seems to be broken (shows 404).
• It also adjusts the minimum and maximum for the YEL income to show their exact amount.

Here are two screenshots that show the results on the calculator:

Minimum_YEL

Maximum YEL

All the following conditions are met:

• I have ensured that my PR respects the target audience of this guide 👩‍💻👨‍💻
• I have read this guide from beginning to the end to ensure that my PR respects the integrity of the guide as a whole 💯
• I have ensured that my PR respects the strong opinions upon which the guide is based. One example would be this 🤝

Thank you!

[sam-hosseini]

@allcontributors add @omidmaldar to contributors for doc

[allcontributors]

@sam-hosseini

I've put up a pull request to add @omidmaldar! 🎉

[sam-hosseini]

Hi Omid!

Thank you for the detailed explanations of what the PR does and the fixes 👍🏼