tracer: fix on pypy-3.11 [0.5 backport] #3727

Job	Run time
smoke (amaranth-lang/amaranth-soc)	44s
check-links	55s
smoke (amaranth-lang/amaranth-boards)	40s
test (3.9)	2m 50s
test (3.8)	2m 32s
test (pypy-3.11)	5m 2s
test (3.11)	3m 38s
test (pypy-3.10)	5m 32s
test (pypy-3.8)	5m 44s
test (3.10)	2m 23s
smoke (amaranth-lang/amaranth-stdio)	48s
test (3.13-dev)	3m 20s
test (pypy-3.9)	5m 33s
test (3.12)	3m 44s
document	55s
publish-docs	6s
publish-docs-dev	0s
required	2s
publish-schemas	9s
publish-package	16s
publish-release	0s
	44m 53s

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