fix footprint property

scd31.kicad_sym

@@ -6,7 +6,7 @@
     (property "Value" "RF4463F30" (id 1) (at 10.16 16.51 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "NPR-70:RF4463F30" (id 2) (at 13.97 -11.43 0)
+    (property "Footprint" "npr70:RF4463F30" (id 2) (at 13.97 -11.43 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (property "Datasheet" "" (id 3) (at 0 0 0)