[rcore][GLFW] Drop unused refresh rate when calling glfwSetWindowMonitor()

the glfw documentation clearly says
  - When the monitor is NULL, the position, width and height are used to place the window content area. The refresh rate is ignored when no monitor is specified.
so it' useless to pass a refreshrate, not to mention we are already doing it in https://github.com/raysan5/raylib/blob/63f82f0ca873f762ffea0c83ed14e461a905b7fc/src/platforms/rcore_desktop_glfw.c#L241

Signed-off-by: tillua467 <tillua467@gmail.com>

Author: tillua467

src/platforms/rcore_desktop_glfw.c

@@ -288,7 +288,7 @@ void ToggleBorderlessWindowed(void)
 
                 // Set screen position and size
                 glfwSetWindowMonitor(platform.handle, NULL, CORE.Window.position.x, CORE.Window.position.y,
-                    CORE.Window.screen.width, CORE.Window.screen.height, mode->refreshRate);
+                    CORE.Window.screen.width, CORE.Window.screen.height, GLFW_DONT_CARE);
 
                 // Refocus window
                 glfwFocusWindow(platform.handle);
@@ -318,7 +318,7 @@ void ToggleBorderlessWindowed(void)
 
                 // Return to previous screen size and position
                 glfwSetWindowMonitor(platform.handle, NULL, CORE.Window.position.x, CORE.Window.position.y,
-                    CORE.Window.screen.width, CORE.Window.screen.height, mode->refreshRate);
+                    CORE.Window.screen.width, CORE.Window.screen.height, GLFW_DONT_CARE);
 
                 // Refocus window
                 glfwFocusWindow(platform.handle);