Error render Regional Indicator flags

Nobody has claimed this yet.

### Windows Terminal version

latest

### Windows build number

Win 10 22H2

### Other Software

font - JetBrainsMonoNL Nerd Font

### Steps to reproduce

a.go

```
package main

import (
"fmt"
)

func main() {
// flag - 🏳️‍🌈
fmt.Println(string([]byte{0xf0, 0x9f, 0x8f, 0xb3, 0xef,
0xb8, 0x8f, 0xe2, 0x80, 0x8d, 0xf0, 0x9f, 0x8c, 0x88}))

// DE - 🇩🇪
fmt.Println(string([]byte{0xf0, 0x9f, 0x87, 0xa9, 0xf0, 0x9f, 0x87, 0xaa}))
}
```

### Expected Behavior

first emoji (rainbow flag) - show right because its a true ZWJ emoji
but second - it two Regional Indicator flags and show as error glyph.

But VSCode with same font show this two Regional Indicator flags properly as `DE` in editor and in own's debug console/terminal.

### Actual Behavior

-

Start by running the provided a.go reproduction in Windows Terminal on Windows 10 22H2 with JetBrainsMonoNL Nerd Font, then compare the Regional Indicator output with VSCode. Done means the DE flag renders correctly while the rainbow flag continues to render correctly.

Written by the indexing model from the issue text.