Base: Use technically accurate term in unveil(2) man page

Base/usr/share/man/man2/unveil.md

@@ -12,7 +12,7 @@ int unveil(const char* path, const char* permissions);
 
 ## Description
 
-`unveil()` manipulates the process veil. The veil is a whitelist of paths on
+`unveil()` manipulates the process veil. The veil is a allowlist of paths on
 the file system the calling process is allowed to access.
 
 A process that has not made any `unveil()` calls is allowed to access the whole