docs: Add macos build documentation

Type: docs

Change-Id: Iee03aacab2cfcb4e87190302dc641e8273b7f096
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
diff --git a/docs/gettingstarted/developers/index.rst b/docs/gettingstarted/developers/index.rst
index 2d27da9..93f4e33 100644
--- a/docs/gettingstarted/developers/index.rst
+++ b/docs/gettingstarted/developers/index.rst
@@ -40,3 +40,4 @@
    buildwireshark
    punt
    quic_plugin
+   cross_compile_macos.rst