[wpiutil] Fix cmake build on windows when only MulticastServiceAnnouncer is used (#8454)

The pragma lib was only in the resolver. But if you had a statically
linked library that only used the announcer, the import wouldn't get
resolved.

wpinet/src/main/native/windows/MulticastServiceAnnouncer.cpp

@@ -22,6 +22,8 @@
 #include "wpi/util/SmallVector.hpp"
 #include "wpi/util/StringExtras.hpp"
 
+#pragma comment(lib, "dnsapi")
+
 using namespace wpi::net;
 
 struct ImplBase {