- Fix brocken PDF link
 - Add Marking codes for SMD diodes
 - Rename footprint with typo in name

Symbol+Footprint imported from @lichtfeind from
https://gitli.stratum0.org/lichtfeind/blahaj-flag-pcb/-/tree/d60fcb74e4c9cf0c26fce721c84537f70c74bc9f/blahai-flag-pcb



Changes done during import:
* Part number was ESP32-C3-MINI-1. Changed to ESP32-C3-MINI-1-N4
  (-40°C to 85°C version).
* Removed a duplicate GND-Pin from symbol.
* Updated Description to contain flash size.
* Updated pin description of IO2, IO4 and IO5 to match the datasheet.
* Added straps to pin descriptions.
* Updated position of pad 51 in the footprint by 0.1mm.

License change ack'ed by @lichtfeind.

Signed-off-by: Chris Fiege <chris@tinyhost.de>