add bom to readme

Readme.md

@@ -6,3 +6,9 @@ Pico DVI Sock
 You surface mount solder the Raspberry end of your Pico on top of this board (thanks to the castellations on Pico's header footprints). This gives you an HDMI-shaped socket at the opposite end to the micro USB socket, which you can drive DVI-D video through. The remaining Pico pins can still have headers inserted, so that the board can be inserted into a breadboard.
 
 [See the schematic (PDF)](dvi-sock.pdf)
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+Bill of Materials
+-----------------
+
+- 1x Stewart SS-53000-001 connector [(DigiKey link)](https://www.digikey.co.uk/product-detail/en/stewart-connector/SS-53000-001/380-SS-53000-001-ND/10492172)
+- 8x 0402 270 ohm resistors