add manual hints for U+0023, regular set (#296)

postbuild_processing/tt-hinting/Hack-Regular-TA.txt

@@ -3,3 +3,6 @@
 # uni0030  touch 39,40,71  y -0.5 @ 7
 # uni0030  touch 39,40,71  y -1   @ 8,12-18
 # uni0030  touch 55,56,57  y -1   @ 19-25
+
+# U+0023 numbersign glyph ID 582
+uni0023 touch 0,1,2,3,18,19,20,21,22,23,24,25,26,27,28,31 x 0.25  @ 13