Update Readme version references and published npm version to 0.1.21 (#45783)

enterprise/frontend/src/embedding-sdk/CHANGELOG.md

+## [0.1.21](https://github.com/metabase/metabase/compare/embedding-sdk-0.1.20...embedding-sdk-0.1.21) (2024-07-18)
+
+
+### Bug Fixes
+
+* **sdk:** fix downloads not working on sdk ([#45657](https://github.com/metabase/metabase/issues/45657)) ([489a0ac](https://github.com/metabase/metabase/commit/489a0ac8da13e586b1a9b1bf8fe1ddac341dce48))
+
+
+### Features
+
+* **sdk:** theme option to customize popover's z-index ([#45613](https://github.com/metabase/metabase/issues/45613)) ([1e48f96](https://github.com/metabase/metabase/commit/1e48f9629a9d025f3c6d28666a7336ac5501fd92))
+
+
+
 ## [0.1.20](https://github.com/metabase/metabase/compare/embedding-sdk-0.1.19...embedding-sdk-0.1.20) (2024-07-16)
 
 

enterprise/frontend/src/embedding-sdk/package.template.json

 {
   "name": "@metabase/embedding-sdk-react",
-  "version": "0.1.20",
+  "version": "0.1.21",
   "description": "Metabase Embedding SDK for React",
   "repository": {
     "url": "git+https://github.com/metabase/metabase.git"