reorder headers to match convention

Author: makslevental

mlir/lib/Pass/PassRegistry.cpp

@@ -6,19 +6,20 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include <optional>
-#include <utility>
+#include "mlir/Pass/PassRegistry.h"
 
 #include "mlir/Pass/Pass.h"
 #include "mlir/Pass/PassManager.h"
-#include "mlir/Pass/PassRegistry.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/ScopeExit.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/SourceMgr.h"
 
+#include <optional>
+#include <utility>
+
 using namespace mlir;
 using namespace detail;