Update typing-extensions to 4.12.0 #511

Job	Run time
matrix-builder	11s
Skipping on Python 3.11 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	18s
Skipping on Python 3.12 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	20s
Test on Python 3.7 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	34s
Test on Python 3.7 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	33s
Test on Python 3.8 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 16s
Test on Python 3.8 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 14s
Test on Python 3.9 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 13s
Test on Python 3.9 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 22s
Test on Python 3.10 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 10s
Test on Python 3.10 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 16s
Test on Python 3.11 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 24s
Test on Python 3.12 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 25s
Test on Python pypy-3.9 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 45s
Test on Python pypy-3.9 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 26s
Test on Python pypy-3.10 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 54s
Test on Python pypy-3.10 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 38s
	18m 59s

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