docs(tt_um_2048_vga_game): specify clock frequency

projects/tt_um_2048_vga_game/info.yaml

@@ -5,7 +5,7 @@ project:
   discord:      "urish"      # Your discord username, for communication and automatically assigning you a Tapeout role (optional)
   description:  "Slide numbered tiles on a grid to combine them to create a tile with the number 2048." # One line description of what your project does
   language:     "Verilog" # other examples include SystemVerilog, Amaranth, VHDL, etc
-  clock_hz:     0       # Clock frequency in Hz (or 0 if not applicable)
+  clock_hz:     25175000       # Clock frequency in Hz (or 0 if not applicable)
 
   # How many tiles your design occupies? A single tile is about 167x108 uM.
   tiles: "3x2"          # Valid values: 1x1, 1x2, 2x2, 3x2, 4x2, 6x2 or 8x2