Update Windows SDK version to `10.0.26100` (#375) #256

Job	Run time
build-cc65	23s
build-matrix-artifacts (x64, Debug)	3m 29s
build-matrix-artifacts (x64, Release)	5m 45s
build-matrix-artifacts (x64, ASAN-Debug)	3m 20s
build-matrix-artifacts (x64, ASAN-Release)	3m 47s
build-matrix-artifacts (Win32, Release)	3m 30s
build-matrix-artifacts (Win32, ASAN-Release)	3m 47s
build-matrix-artifacts (Win32, Debug)	3m 35s
build-matrix-artifacts (Win32, ASAN-Debug)	3m 43s
	31m 19s

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