[AST] Update RuntimeVersions.def for 5.10.

This was just updated in swiftlang#71297.

rdar://121522431

Author: al45tair

include/swift/AST/RuntimeVersions.def

@@ -132,7 +132,9 @@ RUNTIME_VERSION(
 
 RUNTIME_VERSION(
   (5, 10),
-  FUTURE
+  PLATFORM(macOS,   (14, 4, 0))
+  PLATFORM(iOS,     (17, 4, 0))
+  PLATFORM(watchOS, (10, 4, 0))
 )
 
 RUNTIME_VERSION(