feat(curriculum): add challenges to block 4.3 of the English Curriculum

[DanielRosa74]

Checklist:

• I have read and followed the contribution guidelines.
• I have read and followed the how to open a pull request guide.
• My pull request targets the main branch of freeCodeCamp.
• I have tested these changes either locally on my machine, or GitPod.

[moT01]

This is looking good @DanielRosa74 🎉

In the tasks I mentioned on my review of 4.2, the audio was off significantly enough that I thought they should be checked again to try and make them better. I found a number of tasks in here where the audio was off, but not so much that they necessarily need to be changed. They were mostly only off by a tiny bit - I think it wouldn't be too bad if they made it to production like that, but here's a list of what I found:

Task 18 seemed a little long
Task 19 looked a little strange, the audio seemed mostly fine, but Sophie disappeared a little quick.
Task 26-27 start a little late - you don’t hear the whole first word

Task 28-29, 34, 39, 44, 46, 48, 53, 68, 69, 71, 72, 78, 85, 86 - cut off a little early

[DanielRosa74]

This is looking good @DanielRosa74 🎉

In the tasks I mentioned on my review of 4.2, the audio was off significantly enough that I thought they should be checked again to try and make them better. I found a number of tasks in here where the audio was off, but not so much that they necessarily need to be changed. They were mostly only off by a tiny bit - I think it wouldn't be too bad if they made it to production like that, but here's a list of what I found:

Task 18 seemed a little long Task 19 looked a little strange, the audio seemed mostly fine, but Sophie disappeared a little quick. Task 26-27 start a little late - you don’t hear the whole first word
 Task 28-29, 34, 39, 44, 46, 48, 53, 68, 69, 71, 72, 78, 85, 86 - cut off a little early

Changes made, @moT01! Thanks for checking.

[moT01]

LGTM 🎉

[nieldakarla]

LGTM