_content/doc/modules/managing-dependencies: fix link syntax

Change-Id: I88229a3b5bf0ed4d269db57c244e50a6e1e659e7
GitHub-Last-Rev: 32a4b54bf206678ecc89dbf863e09869014d748b
GitHub-Pull-Request: golang/website#143
Reviewed-on: https://go-review.googlesource.com/c/website/+/394374
Reviewed-by: Ian Lance Taylor <iant@google.com>
Trust: Cherry Mui <cherryyz@google.com>
diff --git a/_content/doc/modules/managing-dependencies.md b/_content/doc/modules/managing-dependencies.md
index 9b28999..7752dd8 100644
--- a/_content/doc/modules/managing-dependencies.md
+++ b/_content/doc/modules/managing-dependencies.md
@@ -250,7 +250,7 @@
     ```
 
 The following go.mod file `require` directive example (see the [go.mod
-reference]/doc/modules/gomod-ref) for more) illustrates how to require a specific version
+reference](/doc/modules/gomod-ref) for more) illustrates how to require a specific version
 number:
 
 ```