Fix windows x32 artifact uploads

Author: electricbrass

ci/win-x32-artifact.ps1

@@ -15,7 +15,7 @@ Copy-Item `
     -Path ".\client\RelWithDebInfo\odamex.exe", ".\client\RelWithDebInfo\odamex.pdb", `
     ".\server\RelWithDebInfo\odasrv.exe", ".\server\RelWithDebInfo\odasrv.pdb", `
     ".\wad\odamex.wad", `
-    ".\libraries\SDL2-2.0.20\lib\x86\*.dll", ".\libraries\SDL2_mixer-2.0.4\lib\x86\*.dll", `
+    ".\libraries\SDL2-2.0.20\lib\x86\*.dll", ".\libraries\SDL2_mixer-2.6.2\lib\x86\*.dll", ".\libraries\SDL2_mixer-2.6.2\lib\x86\optional\*.dll", `
     "C:\Windows\System32\msvcp140.dll", "C:\Windows\System32\vcruntime140.dll", `
     "C:\Windows\System32\vcruntime140_1.dll" `
     -Destination "artifact"