Update README.md (#1073)

Author: AlexBeggs

README.md

@@ -56,11 +56,11 @@ this:
 ```python
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
-rules_kotlin_version = "1.8"
-rules_kotlin_sha = "01293740a16e474669aba5b5a1fe3d368de5832442f164e4fbfc566815a8bc3a"
+rules_kotlin_version = "1.9.0"
+rules_kotlin_sha = "5766f1e599acf551aa56f49dab9ab9108269b03c557496c54acaf41f98e2b8d6"
 http_archive(
     name = "rules_kotlin",
-    urls = ["https://github.com/bazelbuild/rules_kotlin/releases/download/v%s/rules_kotlin_release.tgz" % rules_kotlin_version],
+    urls = ["https://github.com/bazelbuild/rules_kotlin/releases/download/v%s/rules_kotlin-v%s.tar.gz" % rules_kotlin_version],
     sha256 = rules_kotlin_sha,
 )