Bump msys2/setup-msys2 from 2.25.0 to 2.26.0 #7840

Job	Run time
build (windows-2019, Win32, v142, 17, Debug)	1m 28s
build (windows-2019, Win32, v142, 17, Release)	2m 25s
build (windows-2019, Win32, v142, 17, -DBUILD_SHARED_LIBS=ON, Debug)	1m 56s
build (windows-2019, Win32, v142, 17, -DBUILD_SHARED_LIBS=ON, Release)	1m 51s
build (windows-2019, x64, v141, 14, Debug)	1m 10s
build (windows-2019, x64, v141, 14, Release)	2m 52s
build (windows-2019, x64, v141, 17, Debug)	1m 28s
build (windows-2019, x64, v141, 17, Release)	2m 39s
mingw (mingw64)	4m 40s
build (windows-2019, x64, v142, 17, Debug)	1m 45s
mingw (ucrt64)	4m 19s
build (windows-2019, x64, v142, 17, Release)	3m 0s
build (windows-2019, x64, v142, 17, -DBUILD_SHARED_LIBS=ON, Debug)	1m 21s
build (windows-2019, x64, v142, 17, -DBUILD_SHARED_LIBS=ON, Release)	2m 18s
build (windows-2019, x64, v142, 20, Debug)	1m 45s
build (windows-2019, x64, v142, 20, Release)	2m 49s
build (windows-2022, x64, v143, Debug, 20)	2m 12s
	39m 58s

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