fix bindings optional field syntax

[atterpac]

Description

Fixes a bug where an optional json field would get an extra ? appended for example from the issue

type User struct {
     ID string `json:"@ID,omitempty"`
 }

would produce and typescript field of "@ID?"? instead of "@ID"?
Fixes # (issue)
#3464

Type of change

• [X ] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• [ X ] Linux

Test Configuration

# Wails
Version         | v2.8.2
Revision        | 0f66a98449e4183247ebadf44d9b3aa5fafd738a
Modified        | true
Package Manager | apt

# System
┌─────────────────────────────────────────────────────────────────────────────────────────┐
| OS           | Ubuntu                                                                   |
| Version      | 24.04                                                                    |
| ID           | ubuntu                                                                   |
| Go Version   | go1.22.2                                                                 |
| Platform     | linux                                                                    |
| Architecture | amd64                                                                    |
| CPU          | 12th Gen Intel(R) Core(TM) i5-1235U                                      |
| GPU          | Alder Lake-UP3 GT2 [Iris Xe Graphics] (Intel Corporation) - Driver: i915 |
| Memory       | 7GB                                                                      |
└─────────────────────────────────────────────────────────────────────────────────────────┘

# Dependencies
┌─────────────────────────────────────────────────────────────┐
| Dependency | Package Name    | Status    | Version          |
| *docker    | docker.io       | Available | 24.0.7-0ubuntu4  |
| gcc        | build-essential | Installed | 12.10ubuntu1     |
| libgtk-3   | libgtk-3-dev    | Installed | 3.24.41-4ubuntu1 |
| libwebkit  | Unknown         | Not Found |                  |
| npm        | npm             | Installed | 10.5.1           |
| *nsis      | nsis            | Available | 3.09-4ubuntu1    |
| pkg-config | pkg-config      | Installed | 1.8.1-2build1    |
└────────────────── * - Optional Dependency ──────────────────┘

# Diagnosis
Optional package(s) installation details:
  - docker: sudo apt install docker.io
  - nsis: sudo apt install nsis

Checklist:

• I have updated website/src/pages/changelog.mdx with details of this PR

[leaanthony]

👍🎉