test: fix flaky webhook dispatch pagination test #721

Job	Run time
PR title check	5s
Checks / Package check	16s
Checks / Integration tests (3.11, ubuntu-latest)	2m 26s
Checks / Spell check	8s
Checks / Lint check / Lint check (3.11)	12s
Checks / Actions lint check	33s
Checks / Lint check / Lint check (3.14)	13s
Checks / Type check / Type check (3.12)	13s
Checks / Doc check / Docs check	33s
Checks / Unit tests / Unit tests (windows-latest, 3.12)	1m 11s
Checks / Docstrings check	17s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.13)	51s
Checks / Type check / Type check (3.11)	14s
Checks / Unit tests / Unit tests (windows-latest, 3.14)	21s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.14)	47s
Checks / Lint check / Lint check (3.12)	13s
Checks / Integration tests (3.14, ubuntu-latest)	2m 11s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.12)	48s
Checks / Type check / Type check (3.14)	13s
Checks / Lint check / Lint check (3.13)	13s
Checks / Unit tests / Unit tests (windows-latest, 3.13)	1m 12s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.11)	51s
Checks / Type check / Type check (3.13)	13s
Checks / Unit tests / Unit tests (windows-latest, 3.11)	1m 7s
	15m 21s

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