disable perl versions in the CI that don't have Docker images #85

Job	Run time
Build on Linux with Perl 5.32	1m 8s
Build on Linux with Perl 5.30	1m 9s
Build on Linux with Perl 5.20	1m 9s
Native on OS ubuntu-latest Perl 5.32	1m 52s
Native on OS macos-latest Perl 5.32	8s
Test on 5.32	1m 47s
Test on 5.30	1m 49s
Native on OS windows-latest Perl 5.32	2m 21s
Test on 5.28	1m 49s
Test on 5.26	1m 41s
Test on 5.24	18s
Test on 5.22	16s
	15m 27s

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