fix: Write very long filenames in GNUtar format correctly #15

Job	Run time
Ruby 2.7 - ubuntu-20.04	28s
Ruby 3.0 - ubuntu-20.04	17s
Ruby 3.1 - ubuntu-20.04	10s
Ruby 3.2 - ubuntu-20.04	12s
Ruby 3.3 - ubuntu-20.04	19s
Ruby head - ubuntu-20.04	13s
Ruby jruby - ubuntu-20.04	1m 0s
Ruby jruby-head - ubuntu-20.04	58s
Ruby truffleruby - ubuntu-20.04	25s
Ruby truffleruby-head - ubuntu-20.04	31s
Ruby mingw - windows-latest	58s
Ruby mswin - windows-latest	1m 14s
Ruby jruby - windows-latest	2m 38s
Ruby 2.7 - macos-latest	31s
Ruby 3.0 - macos-latest	15s
Ruby 3.1 - macos-latest	17s
Ruby 3.2 - macos-latest	13s
Ruby head - ubuntu-22.04	13s
Ruby 3.1 - ubuntu-22.04	13s
Ruby 3.2 - ubuntu-22.04	13s
Ruby 3.3 - ubuntu-22.04	19s
Ruby truffleruby-head - ubuntu-22.04	33s
	12m 10s

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