Fix mods without printer compatibility

printer_mods/DerekBackus/LED_Holder/.metadata.yml

@@ -6,7 +6,9 @@ images:
 - Images/LED_Strip_Example.jpg
 - Images/LED_Holder_Side_View.png
 mod_version: 1
-printer_compatibility: []
+printer_compatibility:
+- VT
+- V2.4
 stl:
 - LED_Holder_340mm.stl
 title: LED Strip Holder

printer_mods/DerekBackus/Right_Skirt_Switch/.metadata.yml

@@ -6,7 +6,8 @@ images:
 - Images/ISO_View.png
 - Images/Filter_ISO_View.png
 mod_version: 1
-printer_compatibility: []
+printer_compatibility:
+- VT
 stl:
 - Filtered_Main_Skirt.stl
 - Side_Skirt_A_Switch.stl

printer_mods/GSL12/pocketwatch_nema17/.metadata.yml

@@ -4,7 +4,8 @@ description: Extruder like Pocketwatch, but with Nema17 instead of Nema14. Maybe
 images:
 - media/pw_nema17.jpg
 mod_version: 1
-printer_compatibility: []
+printer_compatibility:
+- V0
 stl:
 - STL/VORON_Pocketwatch_Nema17_parts_Main_Body.stl
 - STL/VORON_Pocketwatch_Nema17_parts_Motor_Plate.stl

printer_mods/MakeALeft/Switchwire_Front_Grill/.metadata.yml

@@ -4,7 +4,8 @@ description: Removed magnet holders on center panel for cleaner look
 images:
 - Images/CleanGrill.jpg
 mod_version: 1
-printer_compatibility: []
+printer_compatibility:
+- VSW
 stl:
 - front_mid_grill_no_magnets.stl
 title: Switchwire Clean Center Grill