Fix `@` in URL path confusing the parser #6865

Job	Run time
Build Spin Ubuntu	20m 51s
Build Spin (windows-latest)	32m 42s
Build Spin static (aarch64, aarch64-unknown-linux-musl)	16m 1s
Build Spin static (amd64, x86_64-unknown-linux-musl)	16m 4s
all-integration-tests	23m 39s
Review new dependencies for known vulnerabilities	5s
Build Spin (macos-13)	30m 0s
Run release build steps (ubuntu-20.04, amd64, --features openssl/vendored, target/release)	15m 9s
Build Spin (macos-14)	7m 41s
Run release build steps (ubuntu-20.04, aarch64, --features openssl/vendored --target aarch64-unkn...	16m 12s
Lint Rust	6m 3s
Run release build steps (macos-13, amd64, target/release)	27m 54s
Test Spin (ubuntu-22.04-4core-spin)	8m 24s
Test Spin (macos-14)	26m 25s
Run release build steps (macos-14, aarch64, target/release)	12m 39s
Run release build steps (windows-latest, amd64, .exe, target/release)	27m 4s
	4h 46m 53s

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