Replace a couple stray mentions of unchecked

Author: var-const

libcxx/test/libcxx/containers/views/views.span/debug.iterator-indexing.pass.cpp

@@ -10,7 +10,7 @@
 // Make sure that std::span's iterators check for OOB accesses when the debug mode is enabled.
 
 // REQUIRES: has-unix-headers, libcpp-has-abi-bounded-iterators
-// UNSUPPORTED: libcpp-hardening-mode=unchecked
+// UNSUPPORTED: libcpp-hardening-mode=none
 
 #include <span>
 

libcxx/test/libcxx/strings/string.view/string.view.iterators/debug.iterator-indexing.pass.cpp

@@ -9,7 +9,7 @@
 // Make sure that std::string_view's iterators check for OOB accesses when the debug mode is enabled.
 
 // REQUIRES: has-unix-headers, libcpp-has-abi-bounded-iterators
-// UNSUPPORTED: libcpp-hardening-mode=unchecked
+// UNSUPPORTED: libcpp-hardening-mode=none
 
 #include <string_view>