v0.81.2

Update branding colors @osterman (#580)

what

• Use colors
• Update SVG logos for dark and block
• Use SVG where possible

why

• More aligned with our current branding on cloudposse.com

Added support for mermaid diagrams @zdmytriv (#579)

what

• Added mermaid theme and dependencies
• Upgraded docusaurus from 2.3.1 -> 2.4.0

why

• Added mermaid diagrams support
• Upgraded docusaurus

```mermaid
sequenceDiagram
    Alice ->> Bob: Hello Bob, how are you?
    Bob-->>John: How about you John?
    Bob--x Alice: I am good thanks!
    Bob-x John: I am good thanks!
    Note right of John: Bob thinks a long<br/>long time, so long<br/>that the text does<br/>not fit on a row.

    Bob-->Alice: Checking with John...
    Alice->John: Yes... John, how are you?

it will get rendered into

references