Include thirdparty libraries with angle brackets (#5578)

wpilibc/src/test/native/cpp/UnitNetworkTablesTest.cpp

@@ -2,13 +2,12 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
+#include <gtest/gtest.h>
 #include <networktables/DoubleTopic.h>
 #include <networktables/NetworkTableInstance.h>
 #include <networktables/UnitTopic.h>
 #include <units/length.h>
 
-#include "gtest/gtest.h"
-
 class UnitNetworkTablesTest : public ::testing::Test {
  public:
   UnitNetworkTablesTest() : inst{nt::NetworkTableInstance::Create()} {}