Fix text saying first 75k instead of first 70k

[WalshyDev]

Description

Only the first 70,000 participants will recieve a t-shirt or tree. The site however had 75k in a few places and this was confusing people as evident on Discord. This small PR fixes the text.

Test process

• [ ] Test A
• [ ] Test B

Requirements to merge

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [ ] I have commented my code in hard-to-understand areas
• [X] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes

[MattIPv4]

Hey, @WalshyDev - Thanks a ton for this sweet PR! 😄

Would you please shoot me an email when you get a chance? mcowley at digitalocean dot com 🎉