CI : Update to Windows SDK 10.0.20348.0

We take the same approach as gafferhq/gaffer to install the required SDK version as it's no longer provided by the runner.

Author: murraystevenson

.github/workflows/main.yml

@@ -84,9 +84,16 @@ jobs:
 
     - uses: actions/checkout@v4
 
+    - name: Install Windows SDK
+      run: |
+        curl.exe -L --output winsdksetup.exe --url https://download.microsoft.com/download/9/7/9/97982c1d-d687-41be-9dd3-6d01e52ceb68/windowssdk/winsdksetup.exe
+        Start-Process ./winsdksetup.exe -ArgumentList "/Features OptionId.DesktopCPPx64 /Quiet /NoRestart" -NoNewWindow -Wait
+      shell: pwsh
+      if: runner.os == 'Windows'
+
     - uses: ilammy/[email protected]
       with:
-        sdk: 10.0.17763.0
+        sdk: 10.0.20348.0
 
     - name: Install toolchain (Windows)
       run: |