Update Rust to 1.91

[atuchin-m]

Rust 1.91 released: https://blog.rust-lang.org/2025/10/30/Rust-1.91.0/

[github-actions]

Rust Benchmark

Benchmark suite	Current: 228a602	Previous: 671ee95	Ratio
rule-match-browserlike/brave-list	2220020513 ns/iter (± 13392391)	2291947688 ns/iter (± 10780439)	0.97
rule-match-first-request/brave-list	1102840 ns/iter (± 14801)	1098909 ns/iter (± 9107)	1.00
blocker_new/brave-list	169612358 ns/iter (± 570875)	178639073 ns/iter (± 674433)	0.95
blocker_new/brave-list-deserialize	23259888 ns/iter (± 47330)	24510742 ns/iter (± 406712)	0.95
memory-usage/brave-list-initial	10212240 ns/iter (± 3)	10212224 ns/iter (± 3)	1.00
memory-usage/brave-list-initial/max	64057463 ns/iter (± 3)	64057431 ns/iter (± 3)	1.00
memory-usage/brave-list-initial/alloc-count	1610871 ns/iter (± 3)	1610823 ns/iter (± 3)	1.00
memory-usage/brave-list-1000-requests	2666974 ns/iter (± 3)	2666926 ns/iter (± 3)	1.00
memory-usage/brave-list-1000-requests/alloc-count	71385 ns/iter (± 3)	71337 ns/iter (± 3)	1.00
url_cosmetic_resources/brave-list	202321 ns/iter (± 1086)	198077 ns/iter (± 983)	1.02
cosmetic-class-id-match/brave-list	3350856 ns/iter (± 920265)	3358839 ns/iter (± 920606)	1.00

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