Fix clippy::manual-is-multiple-of

[atuchin-m]

Fixing new cargo clippy warnings.

CI builds are breaking for Linux and Windows: https://github.com/brave/adblock-rust/actions/runs/18017996352/job/51267830599?pr=519

Rust 1.90 introduced new linter rules, which broke CI.

[github-actions]

Rust Benchmark

Benchmark suite	Current: a33b8ef	Previous: b9496d8	Ratio
rule-match-browserlike/brave-list	2252296534 ns/iter (± 11247199)	2302005495 ns/iter (± 14715066)	0.98
rule-match-first-request/brave-list	1045612 ns/iter (± 7705)	1033496 ns/iter (± 12609)	1.01
blocker_new/brave-list	154332359 ns/iter (± 641607)	162331363 ns/iter (± 1589318)	0.95
blocker_new/brave-list-deserialize	67196901 ns/iter (± 1422194)	74830341 ns/iter (± 415318)	0.90
memory-usage/brave-list-initial	18344519 ns/iter (± 3)	18344503 ns/iter (± 3)	1.00
memory-usage/brave-list-initial/max	66961309 ns/iter (± 3)	66961277 ns/iter (± 3)	1.00
memory-usage/brave-list-initial/alloc-count	1616130 ns/iter (± 3)	1616082 ns/iter (± 3)	1.00
memory-usage/brave-list-1000-requests	2551938 ns/iter (± 3)	2551890 ns/iter (± 3)	1.00
memory-usage/brave-list-1000-requests/alloc-count	68864 ns/iter (± 3)	68816 ns/iter (± 3)	1.00
url_cosmetic_resources/brave-list	204806 ns/iter (± 2057)	206268 ns/iter (± 3103)	0.99
cosmetic-class-id-match/brave-list	4267320 ns/iter (± 1177973)	4307309 ns/iter (± 1213491)	0.99

This comment was automatically generated by workflow using github-action-benchmark.

[github-actions]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark 'Rust Benchmark'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.10.

Benchmark suite	Current: 01eadb0	Previous: 3652b04	Ratio
blocker_new/brave-list-deserialize	70982453 ns/iter (± 910681)	63494627 ns/iter (± 260374)	1.12

This comment was automatically generated by workflow using github-action-benchmark.