fix: errors.Join defined for go1.19 or below will not work using unsafe.String #21

Job	Run time
commit / lint	11s
codeql / analyze (go)	1m 26s
lint / gen	4s
cover / run	11s
lint / mod	4s
lint / run	24s
nancy / run	9s
test / run (amd64, ubuntu-latest, 1.21.x)	42s
test / run (amd64, macos-latest, 1.21.x)	24s
test / run (amd64, windows-latest, 1.21.x)	1m 22s
test / run (386, ubuntu-latest, 1.21.x)	12s
test / run (amd64, ubuntu-latest, -race, 1.21.x)	17s
cover / send	6s
	5m 32s

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