chore: bump msrv to 1.65 #544

Job	Run time
semver	2m 29s
Check Style	14s
Check MSRV (1.65)	1m 1s
Test with Miri	47s
Test stable on windows-latest	2m 8s
features	1m 13s
Test stable on macos-latest	25s
Test stable on ubuntu-latest	27s
Test beta on windows-latest	1m 21s
Test beta on macos-latest	36s
Test beta on ubuntu-latest	36s
Test nightly on ubuntu-latest	34s
Test nightly on windows-latest	1m 20s
Test nightly on macos-latest	34s
Build docs	14s
CI is green	2s
	14m 1s

Provide feedback