add update

content/notes/setup.md

@@ -29,3 +29,15 @@ Great! Now you have everything you need to start editing and growing your digita
 ✏️ [Editing Notes in Quartz](notes/editing.md)
 
 Having problems? Checkout our [FAQ and Troubleshooting guide](notes/troubleshooting.md).
+
+## Updating
+Haven't updated Quartz in a while and want all the cool new optimizations?
+
+```shell
+# add Quartz as a remote host
+git remote add upstream git@github.com:jackyzha0/quartz.git
+
+# index and fetch changes
+git fetch upstream
+git checkout upstream/hugo -- layouts .github Makefile assets config.toml data layouts static
+```