scripted-diff: Convert global Mutexes to GlobalMutexes

-BEGIN VERIFY SCRIPT-
sed -i -E -e '/^([a-z]+ )?Mutex [a-z]/ s/Mutex/GlobalMutex/' $(git grep -lE '^([a-z]+ )?Mutex [a-z]')
-END VERIFY SCRIPT-

src/validation.cpp

@@ -122,7 +122,7 @@ static constexpr int PRUNE_LOCK_BUFFER{10};
  */
 RecursiveMutex cs_main;
 
-Mutex g_best_block_mutex;
+GlobalMutex g_best_block_mutex;
 std::condition_variable g_best_block_cv;
 uint256 g_best_block;
 bool g_parallel_script_checks{false};