constants: clarify use of implicit default types

A constant with numeric value 1, regardless of its implicit default type,
can be assigned to any "numeric" type, not just any "integer" type.
This corresponds to the examples.

Change-Id: If82fe12be245424421d9604149cf41e1e6b9ac3d
Reviewed-on: https://go-review.googlesource.com/c/website/+/342992
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/blog/_content/constants.article b/blog/_content/constants.article
index 51308d6..63ecbf4 100644
--- a/blog/_content/constants.article
+++ b/blog/_content/constants.article
@@ -483,7 +483,7 @@
 	1.0+3i-3.0i
 
 Therefore, although they have different implicit default types,
-written as untyped constants they can be assigned to a variable of any integer type:
+written as untyped constants they can be assigned to a variable of any numeric type:
 
 .play -edit constants/numbers1.go /START/,/STOP/