[readme] update keybinds, note about TZ

README.md

@@ -129,9 +129,9 @@ A partial list of parameters are below. See the config file for a complete list.
 | `position=`                        | Location of the hud: `top-left` (default), `top-right`, `bottom-left`, `bottom-right`, `top-center` |
 | `offset_x` `offset_y`              | Hud position offsets                                                                  |
 | `no_display`                       | Hide the hud by default                                                               |
-| `toggle_hud=`<br>`toggle_logging=` | Modifiable toggle hotkeys. Default are F12 and F2, respectively.                      |
+| `toggle_hud=`<br>`toggle_logging=` | Modifiable toggle hotkeys. Default are `Shift_R+F12` and `Shift_L+F2`, respectively.      |
 | `reload_cfg=`                      | Change keybind for reloading the config. Default = `Shift_L+F4`                       |
-| `time`<br>`time_format=%T`         | Displays local time. See [std::put_time](https://en.cppreference.com/w/cpp/io/manip/put_time) for formatting help. |
+| `time`<br>`time_format=%T`         | Displays local time. See [std::put_time](https://en.cppreference.com/w/cpp/io/manip/put_time) for formatting help. NOTE: Sometimes apps (or AMDVLK) may set `TZ` environment variable to `GMT+0` |
 | `gpu_color`<br>`gpu_color`<br>`vram_color`<br>`ram_color`<br>`io_color`<br>`engine_color`<br>`frametime_color`<br>`background_color`<br>`text_color`<br>`media_player_color`         | Change default colors: `gpu_color=RRGGBB`|
 | `alpha`                            | Set the opacity of all text and frametime graph `0.0-1.0`                             |
 | `background_alpha`                 | Set the opacity of the background `0.0-1.0`                                           |
@@ -181,7 +181,7 @@ All vulkan vsync options might not be supported on your device, you can check wh
 
 ## MangoHud FPS logging
 
-When you toggle logging (using the keybind `F2`), a file is created with your chosen name (using `output_file`) plus a date & timestamp.
+When you toggle logging (using the keybind `Shift_L+F2`), a file is created with your chosen name (using `output_file`) plus a date & timestamp.
 
 This file can be uploaded to [Flightlessmango.com](https://flightlessmango.com/games/user_benchmarks) to create graphs automatically.
 you can share the created page with others, just link it.