Update BuildUSD action to use upload-artifacts@v4 on Windows #7

Job	Run time
Linux (cp38, /opt/python/cp38-cp38/bin/python, 3.8)	26m 23s
macOS (3.8, python3.8, cp38)	54m 50s
Linux (cp39, /opt/python/cp39-cp39/bin/python, 3.9)	26m 22s
macOS (3.9, python3.9, cp39)	48m 49s
Linux (cp310, /opt/python/cp310-cp310/bin/python, 3.10)	26m 2s
Windows (3.8, cp38)	27m 31s
macOS (3.10, python3.10, cp310)	44m 41s
Linux (cp311, /opt/python/cp311-cp311/bin/python, 3.11)	26m 49s
Windows (3.9, cp39)	27m 32s
macOS (3.11, python3.11, cp311)	44m 25s
Linux (cp312, /opt/python/cp312-cp312/bin/python, 3.12)	27m 9s
Windows (3.10, cp310)	28m 14s
macOS (3.12, python3.12, cp312)	41m 29s
Windows (3.11, cp311)	28m 23s
Windows (3.12, cp312)	28m 0s
CollectPackages	21s
Test (Linux_Python38, 3.8, ubuntu-20.04, python3)	21s
Test (Linux_Python39, 3.9, ubuntu-20.04, python3)	34s
Test (Linux_Python310, 3.10, ubuntu-20.04, python3)	18s
Test (Linux_Python311, 3.11, ubuntu-20.04, python3)	18s
Test (Linux_Python312, 3.12, ubuntu-20.04, python3)	18s
Test (Mac_Python38, 3.8, macos-13, python3)	31s
Test (Mac_Python39, 3.9, macos-13, python3)	44s
Test (Mac_Python310, 3.10, macos-13, python3)	47s
Test (Mac_Python311, 3.11, macos-13, python3)	45s
Test (Mac_Python312, 3.12, macos-13, python3)	48s
Test (Windows_Python38, 3.8, windows-2019, python3)	52s
Test (Windows_Python39, 3.9, windows-2019, python3)	53s
Test (Windows_Python310, 3.10, windows-2019, python3)	51s
Test (Windows_Python311, 3.11, windows-2019, python3)	41s
Test (Windows_Python312, 3.12, windows-2019, python3)	49s
	8h 36m 30s

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