Fix minor typo in docs

Closes #15661.

PiperOrigin-RevId: 454655039
Change-Id: I5ca569c172ca037de19874c6a11f257bcc8c699a
diff --git a/site/en/concepts/platforms-intro.md b/site/en/concepts/platforms-intro.md
index b51ce58..5e615eb 100644
--- a/site/en/concepts/platforms-intro.md
+++ b/site/en/concepts/platforms-intro.md
@@ -50,7 +50,7 @@
 requires an *ordered migration sequence* to keep projects working correctly.
 
 For example, Bazel's
-[C++ Rules] aleady support platforms while the
+[C++ Rules] already support platforms while the
 [Android Rules] don't. *Your* C++ project may not care about Android. But others may. So
 it's not yet safe to globally enable platforms for all C++ builds.