"The certificate authority is not trusted" - Trying to open my server page

# Bug Report

## Problem

I am getting "The certificate authority is not trusted" - Trying to open my server page

### What is expected to happen?
The page should open

### What does actually happen?_
I get the error "The certificate authority is not trusted"

## Information

When I open the same page in a windows browser and view the certificate it says that it is valid and trusted.

The certificate was created with win-acme.

### Command or Code

### Environment, Platform, Device

Android

### Version information

cordova-plugin-inappbrowser 6.0.0
Cordova CLI (on Windows)- 12.0.0 (cordova-lib@12.0.1)

cordova-plugin-android-permissions 1.1.5 "Permissions"
cordova-plugin-device 2.1.0 "Device"
cordova-plugin-dialogs 2.0.2 "Notification"
cordova-plugin-file 8.0.0 "File"
cordova-plugin-inappbrowser 6.0.0 "InAppBrowser"
cordova-plugin-network-information 3.0.0 "Network Information"
cordova-plugin-splashscreen 6.0.1 "Splashscreen"
cordova-plugin-x-toast 2.7.3 "Toast"
cordova.plugins.diagnostic 7.1.2 "Diagnostic"

## Checklist

- [ X] I searched for existing GitHub issues
- [ ] I updated all Cordova tooling to most recent version
- [ X] I included all the necessary information above

Start by reproducing the certificate error on Android with cordova-plugin-inappbrowser 6.0.0, using the win-acme certificate and the reported server page. Compare the Android InAppBrowser result with the trusted Windows browser result; done requires identifying a reproducible certificate-handling cause and documenting the verified resolution.

Written by the indexing model from the issue text.