Perf improvement: kestrel-encoded-url

[pr-benchmarks]

Scenario	Environment	Date	Old RPS	New RPS	Change	Deviation	StDev	Dependencies
kestrel-encoded-url	Kestrel Linux: Encoded URL symbols 8- Trends Intel Lin	12/04/2025 14:08:08	5,516	5,986	0.00 % (470) 👍	2.36 σ	199.51	Changes Name Version Diff Kestrel.dll 1.0.0 -> 1.0.0 aspnet/Benchmarks@e907eb5...b2b7a3f

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@sebastienros