Update windows 6.0 install to 6.0.3

Was still on 6.0.2 but 6.0.3 is latest stable release

Author: award999

.github/workflows/scripts/windows/swift/install-swift-6.0.ps1

@@ -11,7 +11,7 @@
 ##===----------------------------------------------------------------------===##
 . $PSScriptRoot\install-swift.ps1
 
-$SWIFT='https://download.swift.org/swift-6.0.2-release/windows10/swift-6.0.2-RELEASE/swift-6.0.2-RELEASE-windows10.exe'
-$SWIFT_SHA256='516FE8E64713BD92F03C01E5198011B74A27F8C1C88627607A2F421718636126'
+$SWIFT='https://download.swift.org/swift-6.0.3-release/windows10/swift-6.0.3-RELEASE/swift-6.0.3-RELEASE-windows10.exe'
+$SWIFT_SHA256='AB205D83A38047882DB80E6A88C7D33B651F3BAC96D4515D7CBA5335F37999D3'
 
 Install-Swift -Url $SWIFT -Sha256 $SWIFT_SHA256