docs: add links in install doc (#1743)

Michelle Noorali · joelanford · commit 32a6a5a31bc9 · 2019-07-26T19:42:43.000-04:00
diff --git a/doc/user/install-operator-sdk.md b/doc/user/install-operator-sdk.md
@@ -1,5 +1,10 @@
 # Install the Operator SDK CLI
 
+- [Install from GitHub release](#install-from-github-release)
+- [Install from Homebrew](#install-from-homebrew)
+- [Compile and install from master](#compile-and-install-from-master)
+
+
 ## Install from GitHub release
 
 ### Download the release binary
