Fix protocol names #2226

Job	Run time
Check MSRV	1m 35s
Lint macOS 64bit	3m 59s
Lint iOS 32bit	1m 42s
Lint GNUStep + exceptions	2m 21s
Lint header-translator	49s
Lint test-assembly	30s
Check formatting	11s
Test macOS 12	6m 22s
Compiler UI	1m 36s
Assembly tests	1m 12s
Verify header translator output	56s
Check icrate features	0s
${{ matrix.name }}	0s
Test Compiler-RT	1m 35s
Test GNUStep with libobjc2 v1.9	2m 8s
Test GNUStep with libobjc2 v2.0	2m 54s
Test GNUStep with libobjc2 v2.1 on nightly	4m 32s
Test GNUStep 32bit	6m 39s
Test on iOS simulator w. dinghy	0s
	39m 1s

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