Load qt6_version from buildVariables.cmd

This step loads the qt6_version variable from the buildVariables.cmd script and sets it as an environment variable for subsequent steps in the GitHub Actions workflow.

    The call command executes the buildVariables.cmd script located in the Installer directory of the repository.
    The qt6_version variable, defined within the buildVariables.cmd script, is captured and appended to the GitHub Actions environment file (%GITHUB_ENV%), making it accessible in future steps.

This ensures that the qt6_version is available throughout the workflow without needing to redefine it.

.github/workflows/main.yml

@@ -69,8 +69,9 @@ on:
       - '**/COPYING'
 
 env:
+  forbuildVariables: use Installer\buildVariables.cmd file
   #qt_version: 5.15.16
-  qt6_version: 6.3.1
+  #qt6_version: 6.3.1
   #openssl_version: 3.4.0
   #ghSsl_user: xanasoft
   #ghSsl_repo: openssl-builds
@@ -190,6 +191,13 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4.1.7
+        
+      - name: Load Variables from buildVariables.cmd
+        shell: cmd
+        run: |
+          @echo on
+          call "${{ github.workspace }}\Installer\buildVariables.cmd"
+          echo qt6_version=%qt6_version% >> %GITHUB_ENV%
 
       - name: Setup msbuild
         uses: microsoft/setup-msbuild@v2