ci: update Scylla test version from 2025.2 to 2026.1 #1652

Job	Run time
Build wheels / Prepare matrix to run for 3.13 on `linux,macos-x86,macos-arm,windows,linux-aarch64`	3s
Build wheels / Build source distribution	9s
Build wheels / Build wheels for linux on ubuntu-24.04	4m 33s
Build wheels / Build wheels for windows on windows-2022	27m 21s
Build wheels / Build wheels for macos-x86 on macos-15-intel	25m 14s
Build wheels / Build wheels for linux-aarch64 on ubuntu-24.04-arm	17m 7s
Build wheels / Build wheels for macos-arm on macos-14	12m 34s
Publish wheels to PyPi	0s
	1h 27m 1s

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