Fix GPIO silk to read 44 instead of 48

GPIO44 is incorrectly labelled as GPIO48.
Still needs to be corrected on the Eagle design.

Signed-off-by: Michael Welling <mwelling@ieee.org>

KiCAD/PocketBeagle.kicad_pcb

@@ -3201,7 +3201,7 @@
   (gr_text A6/87 (at 126.9066 115.189 -270) (layer B.SilkS) (tstamp 77285A0)
     (effects (font (size 0.9652 0.9652) (thickness 0.12192)) (justify right mirror))
   )
-  (gr_text 48 (at 154.8466 90.1821 -270) (layer B.SilkS) (tstamp 7728CC0)
+  (gr_text 44 (at 154.8466 90.1821 -270) (layer B.SilkS) (tstamp 7728CC0)
     (effects (font (size 1.2065 1.2065) (thickness 0.1524)) (justify right mirror))
   )
   (gr_text 46 (at 152.3066 90.1821 -270) (layer B.SilkS) (tstamp 77293D0)