some footprint/module files contain local paths for `descr` token

[t6z]

There appears to be 22 instances of .kicad_mod footprint/module files that contain paths to local PDFs for the descr token instead of a publicly available URL from Digikey or a manufacturer.

Example from digikey-footprints.pretty/TO-39-4.kicad_mod (contains path to file:///C:/Users/alex_wegscheid/Downloads/MLX90614-Datasheet-Melexis%20(2).pdf):

(module TO-39-4 (layer F.Cu) (tedit 59C91BAC)
  (descr "file:///C:/Users/alex_wegscheid/Downloads/MLX90614-Datasheet-Melexis%20(2).pdf")
  (fp_text reference REF** (at 2.5 -8.75) (layer F.SilkS)
    (effects (font (size 1 1) (thickness 0.15)))

These files all have local paths to PDFs for the descr token:

digikey-footprints.pretty/Ambient_Prox_APDS-9960.kicad_mod
digikey-footprints.pretty/Hall_Sensor_SIP-3_A132_LUA-T.kicad_mod
digikey-footprints.pretty/Jumper_Micro-Miniature_P5.375mm.kicad_mod
digikey-footprints.pretty/Light_to_Freq_TSL235R-LF.kicad_mod
digikey-footprints.pretty/LSSOP-24_W5.6mm.kicad_mod
digikey-footprints.pretty/PC_Test_Point_Mini_3.8x2.03mm.kicad_mod
digikey-footprints.pretty/SOT-23W.kicad_mod
digikey-footprints.pretty/TDFN-8-1EP.kicad_mod
digikey-footprints.pretty/TO-39-4.kicad_mod
digikey-footprints.pretty/UFQFN-32-1EP_5x5mm.kicad_mod
digikey-footprints.pretty/USB_A_Female_E8199-001-01.kicad_mod
src/Source_Footprints/Ambient_Prox_APDS-9960.kicad_mod
src/Source_Footprints/Hall_Sensor_SIP-3_A132_LUA-T.kicad_mod
src/Source_Footprints/Jumper_Micro-Miniature_P5.375mm.kicad_mod
src/Source_Footprints/Light_to_Freq_TSL235R-LF.kicad_mod
src/Source_Footprints/LSSOP-24_W5.6mm.kicad_mod
src/Source_Footprints/PC_Test_Point_Mini_3.8x2.03mm.kicad_mod
src/Source_Footprints/SOT-23W.kicad_mod
src/Source_Footprints/TDFN-8-1EP.kicad_mod
src/Source_Footprints/TO-39-4.kicad_mod
src/Source_Footprints/UFQFN-32-1EP_5x5mm.kicad_mod
src/Source_Footprints/USB_A_Female_E8199-001-01.kicad_mod

Link to KiCAD S-Expression documentation for Footprints