Tests

Fix typo: missing singlequote in unrecognized backend exception #27799

Job	Run time
Python 3.11 on ubuntu-22.04 (Minimum Versions)	16m 51s
Python 3.11 on ubuntu-22.04	16m 7s
Python 3.12 on ubuntu-22.04-arm	12m 56s
Python 3.13 on ubuntu-22.04	16m 20s
Python 3.13t on ubuntu-22.04 Free-threaded	17m 18s
Python 3.12 on ubuntu-24.04	19m 12s
Python 3.11 on macos-13	21m 15s
Python 3.12 on macos-14	15m 11s
Python 3.13 on macos-14	17m 22s
Create issue on failure	0s
	2h 32m 32s

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