_content/ref/mod: fix wording error

The text says "Go release version" but should say "Go version".

Fixes golang/go#62707.

Change-Id: I95f6f95088cd99fdadaa57d301083d484979cdb0
Reviewed-on: https://go-review.googlesource.com/c/website/+/530680
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
diff --git a/_content/ref/mod.md b/_content/ref/mod.md
index 0b1d3e4..a241631 100644
--- a/_content/ref/mod.md
+++ b/_content/ref/mod.md
@@ -534,7 +534,7 @@
 ### `go` directive {#go-mod-file-go}
 
 A `go` directive indicates that a module was written assuming the semantics of a
-given version of Go. The version must be a valid [Go release version](/doc/toolchain#version),
+given version of Go. The version must be a valid [Go version](/doc/toolchain#version),
 such as `1.9`, `1.14`, or `1.21rc1`.
 
 The `go` directive sets the minimum version of Go required to use this module.