[time.cal.operators] Spell out word for small number

Fixes ISO/CS 128 (C++26 DIS)

Author: tkoeppe

source/time.tex

@@ -7921,7 +7921,7 @@
 
 \pnum
 \begin{note}
-The year, month, and day are accepted in any of the following 3 orders:
+The year, month, and day are accepted in any of the following three orders:
 
 \begin{codeblock}
 @\tcode{\placeholder{year}}@/@\tcode{\placeholder{month}}@/@\tcode{\placeholder{day}}@