test: lower python version to 3.12 due to nuitka compiling issues

.gitea/workflows/release.yml

@@ -177,7 +177,7 @@ jobs:
 
           & $env:UV_PATH self update
 
-          $version = "3.13"
+          $version = "3.12"
           Write-Host "Checking for Python $version via uv..."
           $exists = & $env:UV_PATH python list | Select-String $version -Quiet
 
@@ -196,7 +196,7 @@ jobs:
       - name: Build Windows release with Nuitka
         shell: powershell
         run: |
-          & $env:UV_PATH run --python 3.13 python -m nuitka `
+          & $env:UV_PATH run --python 3.12 python -m nuitka `
             --standalone `
             --assume-yes-for-downloads `
             --output-dir=dist `