[libc++][test] Fixes a typo in UNSUPPORTED.

Author: mordante

libcxx/test/std/modules/std.pass.cpp

@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTEd: c++03, c++11, c++14, c++17, c++20
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
 // TODO MODULES fix c++26
 // XFAIL: c++26