Fixed missing subtitle and generated new TOC. (#135)

README.md

@@ -14,13 +14,12 @@ Manager](https://swift.org/package-manager/), then make the outputs available to
   * [Mac OS](#mac-os)
   * [Linux](#linux)
     * [Option \#1: Create a symlink to the linker in the clang directory\.](#option-1-create-a-symlink-to-the-linker-in-the-clang-directory)
-    * [Option \#2:](#option-2)
+    * [Option \#2: Specify a custom PATH via \-\-action\_env](#option-2-specify-a-custom-path-via---action_env)
 * [Quickstart](#quickstart)
   * [1\. Configure your workspace to use rules\_spm](#1-configure-your-workspace-to-use-rules_spm)
   * [2\. Add external Swift packages as dependencies to your workspace](#2-add-external-swift-packages-as-dependencies-to-your-workspace)
   * [3\. Use the module(s) defined in the Swift packages](#3-use-the-modules-defined-in-the-swift-packages)
 
-
 ## Reference Documentation
 
 [Click here](/doc) for reference documentation for the rules and other definitions in this repository.
@@ -53,7 +52,7 @@ sudo ln -s $(which ld.gold) $(dirname $(which clang))
 
 This option worked well on a fairly minimal install of Ubuntu 20.04.
 
-#### Option #2:
+#### Option #2: Specify a custom `PATH` via `--action_env`
 
 Specify a custom `PATH` to Bazel via `--action_env`. The custom `PATH` should have the Swift bin
 directory as the first item.