chore(template): bump PS7 7.6.1, NSIS 3.12, gh CLI 2.92.0

template/Setup-WinBuild2025.ps1

@@ -160,10 +160,10 @@ param(
     # Update these defaults when upgrading pinned tool versions.
 
     # PowerShell 7 LTS (pwsh.exe — modern PS for CI scripts + parallel pipelines)
-    [string] $Pwsh7Version = '7.4.7',
+    [string] $Pwsh7Version = '7.6.1',
 
     # NSIS (makensis.exe — Windows installer builds)
-    [string] $NSISVersion = '3.10',
+    [string] $NSISVersion = '3.12',
 
     # CMake (cmake.exe — C/C++ cross-platform build system)
     [string] $CMakeVersion = '3.31.6',
@@ -175,7 +175,7 @@ param(
     [string] $WiXVersion = '4.0.5',
 
     # GitHub CLI (gh.exe — artifact upload, PR/release/workflow operations)
-    [string] $GhCliVersion = '2.67.0',
+    [string] $GhCliVersion = '2.92.0',
 
     # vcpkg revision: git commit SHA or tag. Default '' = shallow HEAD clone.
     [string] $VcpkgRef = '',