Clarify SyncInterval can be modified by the driver

Author: JeffersonMontgomery-Intel

README.md

@@ -117,7 +117,7 @@ If `-hotkey` is used, then one CSV is created for each time recording is started
 | ProcessID              | The process ID of the process that called Present().                                                                                                                                                                                                                      |                              |
 | SwapChainAddress       | The address of the swap chain that was presented into.                                                                                                                                                                                                                    |                              |
 | Runtime                | The runtime used to present (e.g., D3D9 or DXGI).                                                                                                                                                                                                                         |                              |
-| SyncInterval           | The sync interval used in the Present() call.                                                                                                                                                                                                                             |                              |
+| SyncInterval           | The sync interval provided by the application in the Present() call. This value may be modified later by the driver, e.g., based on control panel overrides.                                                                                                              |                              |
 | PresentFlags           | Flags used in the Present() call.                                                                                                                                                                                                                                         |                              |
 | PresentMode            | The presentation mode used by the system for this Present().  See the table below for more details.                                                                                                                                                                       | not `-no_track_display`      |
 | AllowsTearing          | Whether tearing is possible (1) or not (0).                                                                                                                                                                                                                               | not `-no_track_display`      |