Update to actions/cache@v5 and actions/upload-artifact@v6 #1733

Job	Run time
abi_cafe (ubuntu-latest, x86_64-unknown-linux-gnu)	7m 45s
abi_cafe (ubuntu-24.04-arm, aarch64-unknown-linux-gnu)	5m 31s
abi_cafe (macos-latest, aarch64-apple-darwin)	5m 35s
abi_cafe (windows-latest, x86_64-pc-windows-msvc)	9m 45s
abi_cafe (macos-15-intel, x86_64-apple-darwin)	21m 40s
	50m 16s

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