Update documentation to 2.1.0

Closes #10728.

PiperOrigin-RevId: 293830996
diff --git a/scripts/docs/doc_versions.bzl b/scripts/docs/doc_versions.bzl
index c3db963..f9833b9 100644
--- a/scripts/docs/doc_versions.bzl
+++ b/scripts/docs/doc_versions.bzl
@@ -23,6 +23,10 @@
 
 DOC_VERSIONS = [
     {
+        "version": "2.1.0",
+        "sha256": "b0fd257b1d6b1b05705742d55a13b9a20d3e99f49c89334750c872d620e5b88f",
+    },
+    {
         "version": "2.0.0",
         "sha256": "7d7c424ede503856c61b645d8fdc2513ec6ea8600d76c5e87c45a9a45c16de3e",
     },
diff --git a/site/_config.yml b/site/_config.yml
index d50b53f..f542f33 100644
--- a/site/_config.yml
+++ b/site/_config.yml
@@ -11,11 +11,12 @@
 gems: [jekyll-paginate]
 
 # Update this to the newest release for the default docs.bazel.build version.
-version: "2.0.0"
+version: "2.1.0"
 
 # This must be kept in sync with //scripts/docs:doc_versions.bzl
 doc_versions:
   - master
+  - 2.1.0
   - 2.0.0
   - 1.2.0
   - 1.1.0