kodakaio:: Remove Unicode LRO (U+202D) character from comments

GCC 13 error message:

kodakaio.c: In function 'k_init_parametersta':
kodakaio.c:1830:67: error: unpaired UTF-8 bidirectional control character detected [-Werror=bidi-chars=]
 1830 |          * The default color depth is stored in mode_params.depth:<U+202D>
      |                                                                   ~~~~~~~~^
      |                                                                   |       |
      |                                                                   |       end of bidirectional context
      |                                                                   U+202D (LEFT-TO-RIGHT OVERRIDE)

Fixes: 06fae3526 ("kodakaio params.depth corrected for lineart, color mode made the default.")

backend/kodakaio.c

@@ -1827,7 +1827,7 @@ k_init_parametersta(KodakAio_Scanner * s)
 	    SANE_UNFIX(s->val[OPT_BR_X].w), SANE_UNFIX(s->val[OPT_BR_Y].w));
 
 	/*
-	 * The default color depth is stored in mode_params.depth:‭
+	 * The default color depth is stored in mode_params.depth:
 	 */
 	if (mode_params[s->val[OPT_MODE].w].depth == 1)
 		s->params.depth = 1;