ci: bump supported Go versions to 1.26 and 1.25 #27

Job	Run time
go-versions / go-versions	6s
Windows, Go 1.17	3m 17s
Windows, Go 1.25	4m 31s
Windows, Go 1.26	3m 12s
Linux, Go 1.17 / Benchmarks	26s
Linux, Go 1.26 / Unit Tests and Coverage	32s
Linux, Go 1.17 / Unit Tests and Coverage	1m 12s
Linux, Go 1.25 / Benchmarks	34s
Linux, Go 1.25 / Unit Tests and Coverage	28s
Linux, Go 1.26 / Benchmarks	42s
	15m 0s

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