Merge pull request swiftlang#34293 from apple/shahmishal/5.3/update-watchos-sim

[5.3] Update the Apple Watch Simulator to Series 5

Author: shahmishal

test/lit.cfg

@@ -122,7 +122,7 @@ def get_simulator_command(run_os, run_cpu, sdk_path):
     elif run_os == 'tvos':
         return "simctl spawn --standalone 'Apple TV 4K'"
     elif run_os == 'watchos':
-        return "simctl spawn --standalone 'Apple Watch Series 4 - 44mm'"
+        return "simctl spawn --standalone 'Apple Watch Series 5 - 44mm'"
     else:
         lit_config.fatal("Unknown simulator OS %r" % run_os)