_content/blog/intro-generics: fix typo in code

Change-Id: Ie4626414ab2ff6141166ea330147d8845b66fcfa
GitHub-Last-Rev: a073f54ff2e28f6327ff1e78fb0b4cd02c5a29ad
GitHub-Pull-Request: golang/website#159
Reviewed-on: https://go-review.googlesource.com/c/website/+/405054
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
diff --git a/_content/blog/intro-generics.md b/_content/blog/intro-generics.md
index de66306..dcd2be1 100644
--- a/_content/blog/intro-generics.md
+++ b/_content/blog/intro-generics.md
@@ -192,7 +192,7 @@
 Another way of saying this is that this interface is satisfied by
 only `int`, `string`, or `bool`.
-Now let's look at the actual definition of `contraints.Ordered`:
+Now let's look at the actual definition of `constraints.Ordered`:
 {{raw `
 	type Ordered interface {