Bump ufmt from 2.7.0 to 2.7.1 #979

Job	Run time
test (macos-latest, 3.9)	4m 15s
test (macos-latest, 3.10)	3m 38s
docs	1m 32s
lint	1m 33s
test (macos-latest, 3.11)	3m 51s
Rust unit tests (ubuntu-latest)	2m 27s
test (macos-latest, 3.12)	4m 50s
Rust unit tests (macos-latest)	1m 55s
Rustfmt	7s
test (ubuntu-latest, 3.9)	5m 26s
Rust unit tests (windows-latest)	3m 11s
typecheck	1m 18s
test (ubuntu-latest, 3.10)	5m 47s
test (ubuntu-latest, 3.11)	5m 54s
test (ubuntu-latest, 3.12)	8m 21s
test (windows-latest, 3.9)	7m 20s
test (windows-latest, 3.10)	9m 36s
test (windows-latest, 3.11)	10m 10s
test (windows-latest, 3.12)	9m 16s
	1h 30m 27s

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