Docs: Change TL;DR to Summary

PiperOrigin-RevId: 352112015
diff --git a/site/docs/install-compile-source.md b/site/docs/install-compile-source.md
index ccb5fa6..5d5d926 100644
--- a/site/docs/install-compile-source.md
+++ b/site/docs/install-compile-source.md
@@ -17,7 +17,7 @@
 
 <h2 id="build-bazel-using-bazel">Build Bazel using Bazel</h2>
 
-TL;DR:
+<h3 id="summary">Summary</h3>
 
 1.  Get the latest Bazel release from the
     [GitHub release page](https://github.com/bazelbuild/bazel/releases) or with