Fix another issue with wrong edge tag update in `swap23`. #644

Job	Run time
mmg-debug / ci (ubuntu-20.04, on, off, on, off, int32_t)	1h 16m 43s
mmg-debug / ci (ubuntu-20.04, on, off, off, off, int32_t)	1h 41m 37s
mmg-debug / ci (ubuntu-20.04, off, off, on, off, int32_t)	1h 2m 41s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int32_t)	1h 18m 16s
mmg-debug / ci (macos-12, on, off, on, off, int32_t)	40m 54s
mmg-debug / ci (macos-12, on, off, off, off, int32_t)	55m 32s
mmg-debug / ci (macos-12, off, off, on, off, int32_t)	33m 29s
mmg-debug / ci (macos-12, off, off, off, off, int32_t)	43m 34s
mmg-debug / ci (ubuntu-20.04, off, off, off, on, int32_t)	4m 41s
mmg-debug / ci (macos-14, off, off, off, on, int32_t)	4m 49s
mmg-debug / ci (ubuntu-20.04, off, on, on, off, int32_t)	1h 1m 31s
mmg-debug / ci (macos-12, off, on, on, off, int32_t)	32m 7s
mmg-debug / ci (windows-2022, off, off, off, off, int32_t)	53m 59s
mmg-debug / ci (windows-2022, on, off, off, off, int32_t)	55m 45s
mmg-debug / ci (windows-2022, off, on, off, off, int32_t)	54m 27s
mmg-debug / ci (ubuntu-20.04, on, on, on, on, int64_t)	4m 46s
mmg-debug / ci (ubuntu-20.04, off, off, on, on, int64_t)	1h 9m 56s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int64_t)	2m 24s
mmg-debug / ci (macos-14, on, on, on, on, int64_t)	6m 51s
mmg-debug / ci (macos-12, off, off, off, off, int64_t)	4m 49s
mmg-debug / ci (windows-2022, on, on, off, off, int64_t)	5m 10s
mmg-debug / ci (windows-2022, off, off, off, off, int64_t)	5m 27s
mmg-debug / upload_coverage	1m 38s
	14h 21m 6s

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