Use `Self` instead of `UrlPattern` #100

Job	Run time
macos (macos-latest, aarch64)	1m 36s
sdist	11s
macos (macos-15-intel, x86_64)	1m 2s
musllinux (ubuntu-22.04, armv7)	3m 14s
musllinux (ubuntu-22.04, aarch64)	1m 59s
musllinux (ubuntu-22.04, x86_64)	1m 46s
linux (ubuntu-22.04, x86)	2m 6s
linux (ubuntu-22.04, armv7)	3m 17s
windows (windows-11-arm, aarch64, arm64)	1m 54s
linux (ubuntu-22.04, ppc64le)	3m 24s
linux (ubuntu-22.04, aarch64)	4m 14s
windows (windows-latest, x64, x64)	2m 15s
windows (windows-latest, x86, x86)	1m 52s
linux (ubuntu-22.04, s390x)	3m 6s
musllinux (ubuntu-22.04, x86)	1m 56s
linux (ubuntu-22.04, x86_64)	1m 30s
Release	-1s
	35m 21s

Provide feedback