Add missing autoreset in Packer.pack_ext_type #424

Job	Run time
Run test with Python 3.11 on windows-latest	56s
Run test with Python 3.14 on ubuntu-latest	32s
Run test with Python 3.12 on ubuntu-latest	25s
Run test with Python 3.14t on windows-latest	3m 40s
Run test with Python 3.14 on windows-11-arm	1m 10s
Run test with Python 3.12 on windows-11-arm	2m 3s
Run test with Python 3.14t on ubuntu-latest	42s
Run test with Python 3.10 on windows-latest	1m 9s
Run test with Python 3.13 on windows-11-arm	1m 42s
Run test with Python 3.14 on windows-latest	1m 2s
Run test with Python 3.12 on windows-latest	1m 6s
Run test with Python 3.13 on ubuntu-latest	41s
Run test with Python 3.11 on ubuntu-latest	31s
Run test with Python 3.14t on windows-11-arm	2m 9s
Run test with Python 3.10 on ubuntu-latest	27s
Run test with Python 3.13 on windows-latest	49s
Run test with Python 3.12 on macos-latest	32s
Run test with Python 3.11 on windows-11-arm	2m 51s
Run test with Python 3.14t on macos-latest	57s
Run test with Python 3.10 on macos-latest	51s
Run test with Python 3.13 on macos-latest	24s
Run test with Python 3.11 on macos-latest	21s
Run test with Python 3.14 on macos-latest	27s
	25m 27s

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