add hw_rev_3 label

adapter_platine.kicad_pcb

@@ -5,7 +5,7 @@
     (no_connects 0)
     (area 96.469999 92.55 203.43 157.795)
     (thickness 1.6)
-    (drawings 8)
+    (drawings 9)
     (tracks 169)
     (zones 0)
     (modules 55)
@@ -2357,6 +2357,9 @@
     (pad 1 thru_hole circle (at 0 0) (size 4.064 4.064) (drill 3.048) (layers *.Cu *.Mask))
   )
 
+  (gr_text hw_rev_3 (at 105.41 110.49) (layer F.Mask)
+    (effects (font (size 1.5 1.5) (thickness 0.3)))
+  )
   (dimension 58.42 (width 0.3) (layer Margin)
     (gr_text "58,420 mm" (at 196.93 128.27 270) (layer Margin)
       (effects (font (size 1.5 1.5) (thickness 0.3)))