☂️ 8.0.0 release

[huyenltnguyen]

Description

The version could be 7.4.0 but the changes are pretty significant so I'd suggest a major version bump.

Main changes:

• Convert A2 and B1 English super blocks to chapter-based structure
• Add speaking practice (requires speech recognition capability)

Release plan

• We'll likely need to disable a block as we roll out feat(curriculum): add second version of speaking challenges freeCodeCamp#66446. Once the new version is available, be sure to re-enable the block.