Corrected "bootstrapping" typo.
Closes
@@ -10,7 +10,7 @@ To build Bazel from source, you can do one of the following:
* Build it [using an existing Bazel binary](#build-bazel-using-bazel)
* Build it [without an existing Bazel binary](#bootstrap-bazel) which is known
- as _bootstraping_.
+ as _bootstrapping_.
<h2 id="build-bazel-using-bazel">Build Bazel using Bazel</h2>
