Swift 6.0 Blog Post

[shahmishal]

We will use this GitHub issue to track the blog post for Swift 6.0.

Example of previous blog posts:

• https://www.swift.org/blog/swift-5.10-released/
• https://www.swift.org/blog/swift-5.9-released/
• https://www.swift.org/blog/swift-5.8-released/

[hborla]

Resolved in #807