message: [docs] Update available runtimes
diff: @@ -307,15 +307,15 @@ This is a [class](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refere
  This is an abstract enumeration type that is implemented by one of the following possible `String` values:
  +- `nodejs14.x`
  - `nodejs12.x`
  -- `nodejs10.x`
  - `go1.x`
  - `java11`
  - `python3.9`
  -- `python3.6`
  -- `dotnetcore2.1`
  -- `ruby2.5`
  -- `provided`
  +- `dotnet6`
  +- `dotnetcore3.1`
  +- `ruby2.7`
  +- `provided.al2`
  ## `@vercel/build-utils` Helper Functions
  