fix: no need to convert str to bytes #471

Job	Run time
check (macos-latest)	47s
test (macos-latest)	1m 1s
check (windows-latest)	2m 16s
clippy (macos-latest)	31s
test (windows-latest)	2m 47s
formatting	14s
clippy (windows-latest)	2m 19s
check (ubuntu-latest)	34s
test (ubuntu-latest)	49s
clippy (ubuntu-latest)	29s
build-linux-arm	1m 10s
build (linux, ubuntu-latest, x86_64, target/optimized/bob, Rustls)	57s
build (linux, ubuntu-latest, x86_64, target/optimized/bob, OpenSSL, -openssl, --no-default-featur...	1m 10s
build (macos, macos-13, x86_64, target/optimized/bob, Rustls)	1m 30s
build (macos, macos-13, x86_64, target/optimized/bob, OpenSSL, -openssl, --no-default-features --...	1m 21s
build (windows, windows-latest, x86_64, build, Rustls)	3m 44s
build (windows, windows-latest, x86_64, build, OpenSSL, -openssl, --no-default-features --feature...	2m 3s
build (macos, macos-latest, arm, target/optimized/bob, Rustls)	56s
build (macos, macos-latest, arm, target/optimized/bob, OpenSSL, -openssl, --no-default-features -...	1m 1s
	25m 39s

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