chore(deps): update actions/checkout action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v3 -> v4

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Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

• Support fetching without the --progress option
• Update to node20

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Benchmark for 3bbab38

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Test	Base	PR	%
mysql/consume/1000	4.1±0.22s	4.1±0.16s	0.00%
mysql/push/1000	1909.1±88.46ms	1959.9±98.05ms	+2.66%
postgres/consume/1000	1190.9±54.80ms	1165.2±61.19ms	-2.16%
postgres/push/1000	673.3±38.09ms	762.9±68.60ms	+13.31%
redis/consume/1000	561.8±21.02ms	551.9±1.14ms	-1.76%
redis/push/1000	180.8±18.43ms	172.3±15.77ms	-4.70%
sqlite_in_memory/consume/1000	999.8±40.86ms	1004.7±36.83ms	+0.49%
sqlite_in_memory/push/1000	74.3±4.05ms	69.2±2.40ms	-6.86%