Bazel DevSite: Add link to 5.3.1 docs

PiperOrigin-RevId: 477961455
Change-Id: I22807b50a2ba2a93ce37c9a60fa377c0a8a516fd
diff --git a/site/en/versions/_toc.yaml b/site/en/versions/_toc.yaml
index 4a4c242..e16cc4c 100644
--- a/site/en/versions/_toc.yaml
+++ b/site/en/versions/_toc.yaml
@@ -1,6 +1,6 @@
 toc:
-- label: "5.3"
-  path: https://docs.bazel.build/versions/5.3.0/bazel-overview.html
+- label: "5.3.1"
+  path: https://docs.bazel.build/versions/5.3.1/bazel-overview.html
 - label: "5.2"
   path: https://docs.bazel.build/versions/5.2.0/bazel-overview.html
 - label: "5.1.1"