Bump rustls from 0.21.10 to 0.21.11 in /tests/hello-rustls #401

Job	Run time
Check	25s
Rustfmt	8s
MSRV	37s
Test Suite (ubuntu-latest, stable)	4m 50s
Clippy	38s
spellcheck	7s
Test Suite (ubuntu-latest, nightly)	4m 33s
Test Suite (macos-latest, stable)	4m 52s
Test Suite (macos-latest, nightly)	4m 52s
Test Suite (windows-latest, stable)	4m 36s
Test Suite (windows-latest, nightly)	4m 37s
	30m 15s

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