added return to previous directory before cleanup call #218

Job	Run time
lint	11s
test (ubuntu-latest, ubuntu:latest, ubuntu)	32s
test (ubicloud, alpine:latest, alpine)	30s
test (ubicloud, rockylinux:9, rockylinux)	1m 9s
test (windows-latest, windows)	2m 40s
test (macos-latest, macos)	52s
Test Makeself on Alpine	8s
Test Makeself on FreeBSD	2m 48s
Test Makeself on Nanoserver	36s
Test Makeself on NetBSD	2m 10s
Test Makeself on OpenBSD	2m 23s
Test Makeself on Solaris	5m 6s
	19m 5s

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