chore(docs): add quickstart template link to README (#344)

Added a quickstart template link for new projects.

Note, this is the same destination reachable from https://bazel.build/start

Closes #344

COPYBARA_INTEGRATE_REVIEW=https://github.com/bazelbuild/rules_java/pull/344 from alexeagle:patch-1 5fe92bd165e0f6f7f5d6f1c5c58828b3c24965df
PiperOrigin-RevId: 864352722
Change-Id: Id64e5414c0ef7b8e339fd2717062f9f856ab5eaa

README.md

diff --git a/README.md b/README.md
index e4cfeb0..52be4f9 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,8 @@
 
 For a quickstart tutorial, see https://bazel.build/start/java
 
+The fastest way to try this in an empty project is to click the green "Use this template" button on https://github.com/bazel-starters/java.
+
 For slightly more advanced usage, like setting up toolchains
 or writing your own java-like rules,
 see https://bazel.build/docs/bazel-and-java