And bump Qt and MSVC in randomly located script

COMPILING.md

@@ -78,7 +78,7 @@ Download and install Qt e.g via the [official open source installer](https://www
 
 **Note:**
 - Use the free GPLv2 license for Open Source development, not the commercial "universal installer"
-- Select Components during installation: Expand the Qt section, find the matching version, preferrably **Qt 5.15.2**, and add the compiler components for your compiler, e.g., `MSVC 2019 32-bit/64-bit` for Visual Studio 2019
+- Select Components during installation: Expand the Qt section, find the matching version.  To match the Github builds, you will need to check the versions in `windows/deploy_windows.ps2`.  This gives both the Qt and MSVC versions (e.g. 6.8.1 and msvc2022_64 for a 64bit release).
 
 If you build with *JACK* support, install JACK via choco: `choco install --no-progress -y jack`
 

windows/deploy_windows.ps1

@@ -1,9 +1,9 @@
 param (
     # Replace default path with system Qt installation folder if necessary
     [string] $QtInstallPath32 = "C:\Qt\5.15.2",
-    [string] $QtInstallPath64 = "C:\Qt\5.15.2",
+    [string] $QtInstallPath64 = "C:\Qt\6.8.1",
     [string] $QtCompile32 = "msvc2019",
-    [string] $QtCompile64 = "msvc2019_64",
+    [string] $QtCompile64 = "msvc2022_64",
     # Important:
     # - Do not update ASIO SDK without checking for license-related changes.
     # - Do not copy (parts of) the ASIO SDK into the Jamulus source tree without